Jump to content

Search the Community

Showing results for tags 'piston'.



More search options

  • Search By Tags

    Type tags separated by commas.
  • Search By Author

Content Type


Forums

  • Dirt Bikes
    • General Dirt Bike Forums
    • Make / Model Specific
    • Dirt Bike Technical Forums
    • Special Interest Forums
    • Dirt Bike Regional Discussion
  • General
  • ATV / UTV
  • Inside TT
  • ThumperTalk Clubs FAQ & Help's FAQ/Help & Discussion
  • Chadwick, Missouri: Information & Riding's Topics
  • So Cal Flattrack's Club Forum
  • Thumperjunkies - Ottawa & Eastern Ontario Riders's Discussion
  • Jersey MX and offroad's Places you ride
  • Jersey MX and offroad's Discussion
  • SE Ohio Riders's Club Discussion
  • NorCal Trail Riders's Topics
  • NV Desert Exploration's Discussion
  • North Texas Enduro Riders's Topics
  • Twistin it in PHX's Introduce yourself!
  • Twistin it in PHX's Discussion
  • So-Cal Track and Trail's 1st club ride coming soon...
  • Moto TnT Track & Trail's Moto Tnt Racing Questions
  • Moto TnT Track & Trail's Rider's Forum
  • Dualspot Riders Orange County So~CaL's Club Discussion
  • Niagara region's Club Discussion
  • Walker Valley Single Track Riders's Unanounced ride(s) recap(s)
  • Walker Valley Single Track Riders's Supplements & recovery aids
  • Walker Valley Single Track Riders's Bikes maintenance & restoration
  • Walker Valley Single Track Riders's Safety gear & apparel
  • Walker Valley Single Track Riders's General
  • Walker Valley Single Track Riders's Riding technique
  • Sacramento Area Trail Riders's Club Discussion
  • NC woods riders.'s Club Discussion
  • Colorado US Route 50 Rides's Club Discussion
  • Middle GA Off-Road & Trails's Club Discussion
  • WNY Dual Sport Trail Riders's General Discussion's
  • SoCal JUST RIGHT riding club's SUNDAY 10.13
  • South Texas Dirt riders's Topics
  • PNW Trail Maintenance Club's Trail equipment and how to carry it
  • PNW Trail Maintenance Club's General Discussion
  • PNW Trail Maintenance Club's Introduce Yourself
  • New England riders's Events
  • SC Dirt Riders's Topics

Categories

  • Powersports Gear & Apparel
  • Universal Parts & Accessories
  • Parts & Acc. - Japanese Bikes
    • Honda Parts & Accessories
    • Kawasaki Parts & Accessories
    • Suzuki Parts & Accessories
    • Yamaha Parts & Accessories
  • Parts & Acc. - Euro Bikes
    • Beta Parts & Accessories
    • Husqvarna Parts & Accessories
    • KTM Parts & Accessories
    • Other Euro Parts & Accessories
  • Motorcycles
    • Off-Road Motorcycles
    • Dual Sport Motorcycles
    • Street Motorcycles

Products Categories

Vehicles Categories

Garages

Blogs

There are no results to display.

There are no results to display.

Calendars

  • ThumperTalk Clubs FAQ & Help's Club Calendar
  • Chadwick, Missouri: Information & Riding's Events
  • So Cal Flattrack's Club Calendar
  • So Cal Flattrack's Events
  • Thumperjunkies - Ottawa & Eastern Ontario Riders's Club Calendar
  • Thumperjunkies - Ottawa & Eastern Ontario Riders's Events
  • SE Ohio Riders's Events Calendar
  • NorCal Trail Riders's Ride & Event calendar
  • NV Desert Exploration's Stuff that happens on a particular date
  • Central Washington riders's Events
  • Dualspot Riders Orange County So~CaL's Events Calendar
  • Niagara region's Club Events Calendar
  • Walker Valley Single Track Riders's I love Mondays trail ride
  • Sacramento Area Trail Riders's Events Calendar
  • NC woods riders.'s Club Calendar
  • Colorado US Route 50 Rides's Club Calendar
  • Middle GA Off-Road & Trails's Club Calendar
  • PNW Trail Maintenance Club's Calendar
  • North County San Diego - DirtbikesWithDad.com's 2020 Calendar

Find results in...

Find results that contain...


Date Created

  • Start

    End


Last Updated

  • Start

    End


Filter by number of...

Joined

  • Start

    End


Group


AIM


MSN


Website URL


ICQ


Yahoo


Jabber


Skype


Interests

Found 73 results

  1. I was an idiot and accidentally over-tightened my spark plug on my KX450. In doing so I put a slight indention right in the center of the piston that you can see in the attached photo. I was wondering if this is enough damage to warrant me buying an entirely new piston? Or will I be okay to continue using this one?
  2. So I have a 1998 Yamaha Yz80, and I need a new top end. I found a 2002-2017 Yz85 piston kit, for a very reasonable price, and I was wondering if it would be able to fit my 98 Yz80? Would the piston, wrist pin, bearings, rings, Etc be able to fit? And will it work?
  3. I am rebuilding the top end on my yz250 this winter and need to know what piston to get. I am getting an oem piston and I'm unsure how to identify what piston I need. I believe there are 3 different oem pistons. Anyone know where the identifying marks are?
  4. Hey, new member here looking for opinions I have about 8k miles on my 2015 DRZ400sm. I was riding about 80mph and felt a momentary loss of power, dropped off the throttle and it felt ok. At the next stop i could here top end noise like the piston was tapping so i tore it apart and found: The upper piston ring was ok, the lower was stuck in the groove (flush with the piston ) and unable to move around the piston. there was scuffing on both intake and exhaust side of the jug and piston. Before tearing apart i did a leakdown and could hear air from exhaust and from down by the timing chain. I will try to post pic and video with this post Bike was running great then had started puffing smoke when i get on it quick, and the idle would fluctuate a good bit 2015 DRZ- 3x3, k&n filter, FCR39 (with eddie mod) DRZ E airbox boot and exhaust header with drilled out stock SM muffler with "power tip"
  5. K so I am getting so frustrated with this bike? the problem is when I looked down at my piston with a camera there was absolutely no carbon buildup on the piston and it still looks new. What could cause this? The bike is a 2001 cr80r. (Thanks)
  6. Buckle in this is a long one. Any advice is appreciated! I have a 2011 RMZ 250 that has done me very well for 4 years. Has been a very reliable bike with lots of power. Last year it started to act up a bit, slightly less power & became more difficult to start, especially cold (side note: it’s a Suzuki so it’s never started great cold but usually 3 or 4th kick was the case). Still ran okay though & fiddled with the fuel screw a bit which seemed to help with the starting/power issue for the rest of the season. This past winter we pulled it apart, put a brand new piston in, checked the valve clearances, moderate amount of carbon build up on the valves which we cleaned off, and put in a new spark plug which is also in spec. Bike still wouldn’t start great cold but was starting on about the 8-10th kick and power seemed to be improved although not 100%. I’ve take it for quite a few rides now and broken the new piston in and am having more issues: -won’t kick over cold at all but bump starts just fine -will kick over first or 2nd kick when warm but NOT when the bike starts to get even slightly hot -very little top end power. Bottom of the gears seem to be full power and the hotter the bike gets the less power I have in the top end -bike began to backfire quiet a bit when hot -won’t idle in gear when hot Any advice on what to replace/trouble shoot next? I had a buddy tell me it could be a worn out injector so that’s what I’m looking at replacing next. Thanks!
  7. I just bought a 1999 kx 125 and wanted to inspect the top end so i took off the pipe and looked through the exhaust port and saw the images below, I am new to this but i think that that is blow by meaning i could use a new top end. What do you guys think that I should do, if anything?
  8. Alright, so I just got done rebuilding the top end on my 07 KX 450F and as I am getting ready to install the top of the cylinder head I notice I have one last piece remaining that I can't account for. I mark everything and take several pictures so I can make sure everything is put back together perfectly, but somehow this piece evaded me. I showed where I think it goes in one of the pictures I provided. Can someone tell me if I am right or if this piece goes somewhere completely different?
  9. I bought a 2010 KX250f from a guy who bought the bike brand new back in 2010 (only had 1 owner). The guy put a high compression piston in this bike. Also he was pretty much running straight race gas because when he took it to the shop, they must have messed with the jets because they weren’t stock anymore. I got new jets. Currently at...........………Pilot Jet - 42. Main Jet 185 I’ve messed with my air screw and tried a few things out but I still have to kick my bike like 30 times before it finally starts! The piston is supposed to be high compression but it doesn’t feel that way. I’m thinking of just replacing it and going back to stock??? Any thoughts? Ive read that valve clearance is an issue with this year bike... Also that Kawis need a little throttle when you kick. It ends up flooding every time. Send help please!!
  10. Hello u guys I have to do a full service on my 2006 250 exc, it’s an eu model. I have a big big scratch on the cylinder, and I don’t want to reuse it. i’ve seen some things that I can do with it One of my wishlists it’s a 300 upgrade, and I need to know what do I need to change to a 300 convertion, and if you can tell me which other upgrades I can do with it, from newer models, like an electric starter, mapping, and other stuff, just because I don’t know if the parts of the newer models like a 2011/12/13 cylinder fits my engine. please let me know if you can help
  11. Seized my engine last weekend because i put in my oil filter one backwards... i'm a dummy. Needles to say I need a new cylinder and a new piston this is what i'm ordering or at least planning to order.. Piston : https://www.rockymountainatvmc.com/p/974/3784/Wiseco-Piston-Kit?v=533&s=47466 Cylinder: http://www.ebay.com/itm/2004-KAWASAKI-KX250F-OEM-CYLINDER-JUG-TOPEND-TOP-END-KX250-KX-250F-250-F-RMZ250/192304125998?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649 going used on the cylinder to save some money. My question is.. has anyone done one of these and if so do you have a step by step how to? or know of a video on how to do it? on a bit of a budget and want to get back riding as soon as possible. Thanks for looking!
  12. First off, I know that there are multiple posts on the cast/forged piston debate. I keep jumping between being firmly decided on one to the next. Here's my situation. This is the first bike I've ever owned (1999 KX250) and have ridden it for 2 seasons now. I use it for mostly trail riding with a few visits to the local track to display how much of a noob I really am. I noticed piston scoring through the exhaust port and not knowing the history of the bike I opened up my can of worms. I am at the point where my head was sent out and re-plated (due to small chips in the plating) and I found play in the crank bearing so the case is now split in half. I ordered the Hot Rods bottom end kit (CBK0055) and swapped out my input shaft and output shaft first gear with a '97 transmission as found in other threads here on TT. The crank was a wiseco, but rebuilding it was not an option anyways as some previous owner decied that the crankshaft threads on the stator side were too long and cut off all but a few threads . So now that leaves me with the decision: What piston to use? Wiseco? Vertex? Pro-X? OEM? I know that many people like the wiseco/forged pistons for longevity. People stated that the forged pistons didn't need as much clearance as in the past, etc but these posts were back from early 2010's. I am leaning towards Wiseco as I assume if anything forged has become even more versatile but my thoughts keep thinking "How likely is it to cold seize? Is it more likely to score my new cylinder than a cast?" and "If more clearance is needed for forged should I be running a cast in my recently plated (stock size) cylinder?" I just tend to over think things sometimes but the last question is the one that is bugging me. Thanks for any opinions/help. Also, is the case sealant just like a high quality silicone? I hear people mentioning HondaBond and YamaBond is good for this. Is this the same stuff you use on for grips?
  13. The bike in question is a 1999 Suzuki RM125, not sure how to tell which casting (A, B, etc.). I bought a ProX type A piston for the bike, and then afterward when I looked at the one in my bike it has a "B" on the top. When mine arrived it had an "A" (no surprise). It looks like type A has an OD of 53.94 mm and type B has an OD of 53.95 mm. I was wondering if I can run the piston I got in my bike without any issues. Would that hundredth of a millimeter really matter? Either one would be a big improvement over my old one. Also, both A and B are windowless. What exactly does that do, would the bike have more power if the piston had a window? Thanks!
  14. So, I have a 1998 Yamaha yz80, and it's had a lot of hours on the top end, so it's time for a rebuild. I have a neighbor who is going to help me with it, so i havent taken it apart yet. I'm trying to figure if my bike needs a whole new piston kit, or a gasket kit, or does it need new reeds? So its lost compression. Way less then what it used to be before. The bike is really hard to start, and it fouls my plugs like none other. It doesen't have too much of a power loss, although, the powerband has become weaker. I just want my bike to be running like how it used to be, and I don't want to spend a lot of money on it. It will start sometimes, but most of the time, it will only bumpstart. I appreciate you viewing this, now, so let me know of what I need.
  15. First post...and of course I'm asking for help. Somehow my son demolished the piston on his kx85 (2009). Cylinder is slightly gouged near the exhaust port and cylinder head shows signs of overheating. Could I get by with a cylinder sleeve in this situation? If so, could I get it pressed in at a machine shop or is it better to go to a moto shop? ...Or is it better to replace the entire cylinder jug? If so, any suggestions on good brands (or brands to avoid)? I'm a 2-stroke newbie...any advice would be greatly appreciated!
  16. Hey everyone, I'm actually new to the forum and just created my page, so hello to you all! Anyways, I have a 2014 Honda Crf250r that I purchased in December of '16 with only 34.5 hours on it. I have since ridden that bike everyday that my work schedule allows, and she now has 100 hours on her. I have noticed the bike has become a bit harder to start, taking 10-20 kicks compared to the 1 or 2 that it would originally take to start it. Once the bike hit 100 hours, I decided it was time to tear it down to the frame and open up the heart of the beast. Upon removing my stock air boot, I noticed some dirt in my throttle body. After removing my throttle body, I also noticed some dirt where the throttle body connects to the engine... Probably why my bike is getting hard to start... Now I have not opened up my engine yet, and this is where you guys come in to help, but what exactly should I replace internal wise in my engine at 100hrs? I consider myself a C or B class rider, and I stay in the upper rpm range of my bike frequently. I would like to gain a little bit more power out of my bike, specifically in the top end/over-rev area since my bike has enough bottom end already to pop wheelies in 4th if I really try. I was thinking a high compression piston, cam, and idk what else. I don't want to lose bottom end power though, and I would like these internals to be reliable too. What part recommendations do you guys have, and what are some good brands? Hotcams/Procircuit/Carillo/Wiseco/etc
  17. So I just bought a 2017 rmz 250 and I was wondering how often I have to rebuild the top end. I figured as long as a keep the oil changed every 3 hours and a new oil filter every other oil change and keeping the air filter clean I wouldn't have to touch the top end very often but the book says every 20 hours and I don't think I can fit that in my budget so often, any opinion is appreciated, thanks.
  18. Apologies for the long post, but I’m including as much info as possible. I have a 2-Stroke Yamaha TDR250 1KT, same motor as the TZR250 apparently. I just completed a top-end rebuild. I only replaced the left piston as the right one look good. Probably should have replaced both, but anyway… My problem is the right cylinder/exhaust gets very hot very quickly and smokes a lot. The exhaust is hot only after 30 seconds of idling. The left remains room temperature and does not smoke. I don’t want to ride it too much in case it causes irreparable damage. But when I did try to ride her, I can only get a few hundred meters before she cuts out. I have to start again and can not get into 2nd gear before it stalls again. I’d have to limp home at a bicycle’s pace as anything above idle revs kills the engine. Not sure if the poor running is related to the hot exhaust, or another problem entirely. I’ve done the following troubleshooting: - swapped around plugs – no difference - swapped around plug leads – no difference - swapped around Carburetors (but not the Jet Needles) – This then made the left cylinder smoke and the right smoked a little, but not as much as previously. The carbs are back on their original sides as they are specifically left and right. - sprayed carb cleaner onto the carb boots to test for air leaks and that had no effect. - Raised the Jet Needle in the right carb for a richer mixture – It appears to smoke less (could be my imagination), but it still gets hot quickly. - Checked the plugs again and the troublesome cylinder’s plug looks to be running very rich (all dirty), so I lowered the needle this time for a leaner mixture. Still no difference. I removed the exhaust and wiped my finger in the cylinder’s exhaust port. Looks like black paint! Has anyone ever experienced this and what was the solution?
  19. Hey guys, I recently got my cylinder re sleeved. The head was also in very very bad shape, so the mechanic fixed that also. It had lots of deep gouges and scratches. The piston now hits the head before it can reach top dead center so the kickstart will not move. I don’t know what to do, can anyone help?
  20. hi guys, im rebuilding my drz400 engine and ive heard that your cylinder and piston need to be matched, i am debating getting my old cylinder re-plated or buying a new one, if i was to buy a stock 90mm cylinder would it work with my piston? (a brand new wiseco, measuring 89.96mm)
  21. I just picked up a 93 kx 250 traded my 125 since it need a piston no problem i thought so i went to find the piston size for it but mine is a big bored at 73.8mm i just don't know where to find the new piston i was told by the owner that i could just search 73.8 mm piston and buy any one but i highly doubt that so if anyone can point me in the right direction that would be great thanks. Posted some pic below to see if it helps.
  22. Hi guys! I'm wondering if any of you know for sure if the advertised compression ratio of CP Carrillo piston for our bike is achieved with the single layer base gasket (.010" thickness) or with the standard 3 layers base gasket (.030" thickness). I'm asking this because I noticed they offer the same piston (12.5 cr) for both LTZ and DRZ but with different gasket kit, and it seems odd to me since it's the same engine.
  23. Is there supposed to be a bit of resistance? Is it warped? Is the pin worn out? Can I run it without damaging the cylinder? https://streamable.com/mll5b
  24. Hi all. For those that have done top end rebuilds / piston replacements, what's your opinions/experiences on the following manufacturers? Consider this a bit of 'research' I'm doing before buying one kit or another for my rebuild. Plenty to chose from. Here come the opinions---and I appreciate it in advance. Thanks! Wiseco? Namura? Pro X? Vertex? Wossner? (and my favorite, based on name...) Outlaw Racing?
  25. HI. I have CRF450r 2007. (Sorry for my inglish. I am from Georgia. Tbilisi ) thanks . I want to by Wiseco or same piston. My bike bore size is 96.03 mm (I do not know for sure. Car engine master told me). I am interesting about clearance between bore and Wiseco piston. What clearance will be between wiseco piston and my bike bore ? What size of same piston i need tu buy for my baike bore size? What is the real size of wiseco piston for crf 450r/ or maby will i buy another brand piston. When i look to my cylynder, i see good hone and it looks like new. mayby engine master is vrong about size.
×
×
  • Create New...