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
    • General Forums
  • ATV / UTV
    • General ATV / UTV Forums
    • Make/Model Specific
    • ATV / UTV Regional Discussion
  • Inside TT
    • Inside TT Forums
  • ThumperTalk Clubs FAQ & Help's FAQ/Help & Discussion
  • RokFox's Current Kit
  • LCV Trail Riders's Local Information
  • LCV Trail Riders's Planning
  • KJRRC - Krannie's Just Right Ride Club's Club Forum
  • Long Island Moto X-Change's Trail Riding
  • Long Island Moto X-Change's Enduro Racing
  • Long Island Moto X-Change's Motocross Racing
  • Long Island Moto X-Change's Harescramble Racing
  • Long Island Moto X-Change's Dual Sport
  • So Cal Flattrack's Club Forum
  • Sonoma County,Mendocino County,Lake County & Napa County 707 Trail riders's tell us about your self and about your bike, what type of ridding you like to do,
  • Couple Riders of Stanislaus's Club Forum
  • Thumperjunkies - Ottawa & Eastern Ontario Riders's Discussion
  • Jersey MX and offroad's Places you ride
  • Jersey MX and offroad's Discussion
  • Sonoma Coast Skinny Twisties's Discussion
  • New Mexico Trail Riders's Discussion
  • Okanagan Off Road Motocycle Club's Club Forum

Categories

  • 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
  • Powersports Gear & Apparel
  • Trucks, Trailers & Toy Haulers

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
  • RokFox's Enduro Ride Schedule
  • LCV Trail Riders's Ride Calendar
  • KJRRC - Krannie's Just Right Ride Club's Club Calendar
  • So Cal Flattrack's Club Calendar
  • Sonoma County,Mendocino County,Lake County & Napa County 707 Trail riders's Club Calendar
  • Couple Riders of Stanislaus's Club Calendar
  • Couple Riders of Stanislaus's Club Photos
  • Thumperjunkies - Ottawa & Eastern Ontario Riders's Club Calendar
  • Thumperjunkies - Ottawa & Eastern Ontario Riders's Events
  • Sonoma Coast Skinny Twisties's Calendar
  • New Mexico Trail Riders's Events
  • Okanagan Off Road Motocycle Club's Club 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 59 results

  1. 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?
  2. rgleato

    Need Advice On Piston Replacement

    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?
  3. Dr8699

    HELP ME FIGURE OUT WHY...

    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"
  4. Howard94

    Which piston for 02 YZ 250

    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?
  5. fftoddster

    Top end problems

    Help. Burned up piston on 2003 YZ250 2stroke. Ride at Glamis in sand. Lost compression going up Oldsmobile. run 40:1 mix pilot jet 50 air screw 1 turn out. Main jet 182 with needle clip in middle 3rd notch. Stock exhaust appears it was still to lean. Ate piston on exhaust side rejet or do I have bigger problems? Don't want to lose another top end. premix ratio ok?
  6. Brand new OEM piston has this small "dent" on the leading edge. Top of piston not smooth where you see the defect, sort of pushed up slightly, enough to feel with fingernail. Also you can see discoloration all around the defect, both on top and on front of piston. Would you use it or get RMATV to exchange it for another? I don't want to use it like this, especially with this defect running over exhaust port. Just want to see what others think and not overreact. What do you think?
  7. Chiofalo11

    What could have caused this?

    Hello, my dad and I just re-did the top end on my 2014 Kx250f. We used a new cylinder with a wiseco piston and rings. Everything went smooth and had no problems putting it back together. It started right up and ran great as we let it idle for a few. Then the rpms jumped up quite a bit so we shut it down. When we went to start again it kicked over smoothly but wouldn't start. My dad brought it into the basement and kicked it over a few times and all of a sudden it wouldn't turn over at all. He said it appeared to be seized so he pulled the head cover and checked for oil circulation which was good. Today we pulled the head and cylinder and found that the upper oil ring was splintered. Now the piston, cylinder and rings are trashed. Oil circulation does not appear to be the issue and plenty assembly lube was used. Rings were also installed just as indicated in the instructions. What could have caused this to happen??? Thanks for any help, Danny
  8. nick andrist

    kx250 98 Kx250 Rebuild Help

    Hello everyone I want to start out with I bought the bike a couple days ago and started the year down. When I bought the bike the kick start didn't move an inch so I figured it was seized. I started the tear down of the top end and I will included pictures to show you what I found. A piece of the piston broken off. I'm not to sure what my next step is. With this happening is the crank garbage too or is it still ok. with this happening the top end is in great shape I'm just scared of the bottom end. So many questions. Thank you for replying
  9. Stafford StJames

    2002 TTR90 piston kit

    Hi Guys, trying to get a replacement oversized piston kit +.5mm for a 2002 TTR90. The only ones i seem to be able to find from Wiesco etc are for a 2003 onwards? Does this definately not fit a 2002? Does anyone know a manufacturer that makes one for a 2002? Thanks guys, any help is most appreciated.
  10. I just ordered a piston kit for my 1998 yz80, and it does not fit into my cylinder. I can't really remember if its a 47.5 mm or 47, i'm pretty sure it's a 47.5 but it just does not fit into my cylinder. My cylinder does have a big groove in it, so do I need a new cylinder for it to fit, or a new piston? Please respond ASAP!
  11. Hey, new member here (been using the fourm for years) but just finally joined. 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,
  12. Roostre

    Pitster gets a big bore kit

    Installed a big bore kit in my LXR 250 this weekend. These run the water cooled NC250 motor. Bike pulls better everywhere, no pinging on pump gas even with a full point of compression ratio increase.
  13. I went to do I top end on my bike because the compression felt low and it is now winter so there is not much riding to do anyway. When I took the piston out I noticed a lip had formed on the exhaust port side of the piston. There was no wear or scoring on the cylinder which I found strange. I put a new piston in warmed up the bike at idle with a few blips on the throttle. During this time when ever I would blip the throttle there would be a low quite sound like sand was in my expansion chamber. I blew out my pipe but the noise was still there. I pull the head of to just make sure everything look right after being ran and the piston had a small lip on it again. I've link a picture of the piston that I replaced with the new one.
  14. It is time for me to do a top end on my 2012 KTM 200 XC-W. I went to the motorcycle shop to price up a top end, they asked me what grade piston is it that matches your cylinder. I had no idea about this, there are grades A, B and C and maybe more or less, all with 0.01mm differences, and it will say in my cylinder what piston to get. I have looked all over the internet and nothing has told be WHERE to find the marking to show me what size piston to get, im sure i could figure it out but what i really want to know is if i need to take the cylinder OFF to get to the markings. I have taken a photo of the markings that i can see on the outside of the cylinder if that's any help. Thanks
  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. Zapdos

    Can I run this piston?

    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
  17. 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.
  18. kevelev

    2 Stroke Piston Questions

    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!
  19. 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.
  20. Rainnosaurus

    2010 KX250f - won’t start, cold start

    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!!
  21. Diogo Silva

    250 EXC ‘06 upgrades

    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
  22. 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?
  23. FloydIN

    Pistone Bore Clearance

    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.
  24. MotoxMike7

    2014 CRF250r Engine Mods

    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
  25. 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.
×