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Found 10,000 results

  1. So the other day I pulled the old 2004 YZ250F out after moving to Colorado from Hawaii so... the 1st problem started with ALTITUDE over a 6000 ft difference. I knew i needed jets so i went to the local shop here and they hooked me up. the 2nd problem after i got it all together, and rode around seemed flat at the top end and i started to get cherry pipes. so my dad said valves, you should check to see if its getting enough air. so i pulled it apart myself and start getting my gaps for re-shimming it. the 3rd problem comes along all the valves need adjustment. left exhaust was 0.15mm right exhaust was 0.15mm left intake was 0.00mm (could not get a 0.04mm is smallest feeler gauge i have) center intake was 0.00mm right intake was 0.09 specifications for the maintenance manual exhaust is 0.17mm to 0.22mm intake spec is 0.10mm to 0.15mm so i pull the center intake shim to see what size i need to put in and its 120mm, the smallest shim so im guessing i need new valves??? THIS IS WHERE I NEED YOUR HELP!!!!!!! ????????do i need to get all new valve assembly ( valve, seals, seats, springs, and retainers?) or just some parts ???????what kind of head work does this need before i install new valves??? (valve seat cutting) what shop is good? ????????steel vs titanium? ??????? will any valve work for a yz250f or do i need to get a measurement? since I am going to rebuild the valve train, im going to toss a new ring and piston in also. ?????? brands should i use for ring and piston ? should i send my cylinder off also? thanks for the help in advance
  2. Im trying to replace the clutch side crank seal on my blaster. it seems i cant get the whole old seal off. the seal didnt come of in one, i had to scrap it off. And now i cant fit a seal in there. here are some pics.
  3. MXracer195

    Yamaha Got a Yamaha Warrior

    I traded my zero turn that needed some work for a Warrior that needs rebuilt. I traded with my friend and luckily he has all the parts for the rebuild except the crank and gaskets. I'm thinking about building it up and trading it for a nice 250F or 450F but I have a feeling I'm going to fall in love with the Warrior and end up with it and a bike. I'm probably going to mod it a pretty good bit and may black it out. Right now it is white with a red tank cover and all the plastics are in great shape so I'll keep them as a spare if I get black plastics. Anyone know where I can find a blue hood with maybe a scoop? I plan to black it out with blue accents and I think that'll look pretty nice. Are they any good for racing or are there any classes they can even race in? I want to see how I'd do in a race.
  4. I am completely stumped. I am working on an 07 Raptor 350. It has a intermittent spark. However, the spark only shows up occasionally when releasing the start button. It never sparks when cranking. Only occasionally when releasing the start button after attempting to start. I have replaced the stator, swapped CDI's, swapped batteries, swapped ignition coils, checked ground continuity for the CDI and the battery, cleaned the ground for the ignition coil, cleaned all connectors, checked continuity between all wires in the ignition circuit and checked power to the CDI. I have become completely stumped. I have no idea where to go from now. I have found several threads started on google for this same issue but no one ever has a solution. Please help!!!
  5. Has anyone does this yet? I have a 01 wolverine that I've had for 01 year and I just thought about adding a brake light to it. I have a raptor 700 front master cylinder on there since the original crapped out so that's the easy part and then I planned on using a banjo bolt style for the rear since the left hand brake works the rear brake but I wasn't sure about the plug/ tail light section. I'm thinking of using a raptor 350 tail light harness to try to fit with the wolverine square lens. For the wiring I was gonna take a power off that is keyed so it's not always on but wire them in parallel to make it come on when either or switches kick in. What do you guys think or is there a better way?
  6. kimble93

    Yamaha banshee issues

    okay guys!!! im having some issues and its really starting to piss me off. it almost seems like my right side cylinder isnt firing. i have good compression and when i first starts up it puffs out your normal two stroke smoke and then it goes away and sometimes it will run like its suppose to but 80% of the time it does. maybe a fuel issue??? im going to check spark and om everything out tonight. everything i have checked so far is good any ideas??
  7. I've been off here for a while but getting back into the woods lately. Thought I'd add some Blaster content. I've posted picts of my 2003 KTM 250 SX powered Blaster rocketship: My latest project is another 99 Blaster but with a Vitos big bore kit and 3mm stroker: My son actually put this together for me. It had been sitting for a couple years while I was busy at a new job and working with Search and Rescue. This machine is still in its early days. My son and I have build a few Blasters including a 32hp DT200 powered liquid cooled. This bored and stroked motor makes about the same power as the DT200. We have got more power than this with ported and rechambered aircooled motors so I know there is more potential in this motor. A very successful mod was filling the intake reedbox with epoxy rather than opening it up. The tighter box resulted in cleaner jetting and a wider powerband on the smaller aircooled motors. I strongly believe in making mods one at a time to be able to see what works and what doesn't.
  8. Mmanos3

    Yamaha 04 YFZ 450 Starting issues

    Ok i have this starting issues with my 04 yfz 450 like many others have. i have a high compression piston and its jetted with a hmf pipe. I have replaced the battery twice with higher cranking batterys, replaced the starter, had the valves shimmed, had the carb rebuilt, and The spark plug is new and gives good spark. I also run the quad with my headlights on whenever i bump start it. The issue im having is whenever i completely charge it up and take it out it will fire right up on the first click of the starter but if i shut it off it will not start up again without bump starting it. It sounds like there isn't enough juice pushing the motor over and sounds like the battery is dying but if i put it on the quick charger it says i have a high percentage left on my battery. I was thinking stator, cdi box, or a relay please help its killing my wallet and motivation lol
  9. ok well im new hear and wanted some advice, i have a 05 660 that is cammed(stage 2) jetted to (50,55,25) i have extended swing arm and i run vp c12. well just recently it started running like shit and wont idle unless i have the idel screw all the way in, wich makes it run like crap all the time, then when i get in to second the thing bogs down and has no get up and go, this problem last all other gears and i dont know what to do? P.S it also has a custom built spectrum intake in it, and after putting the jets in i never adjusted the carb cause im not sure how to do it for my location and cause the pain it is to take this thing apart lol. thanks for the help guys or gals.
  10. lynnbg

    Yamaha warrior starter clutch

    where is the cheapist place to buy a starter clutch for a yamaha warrior??
  11. ss55539

    Yamaha poly skid plate

    hey guys, ive been looking for a poly skid plate for my 09 YFZ450R with no luck. everythings either discontinued or a blank skid. does anyone have an idea where i might be able to purchase one?
  12. Once I get Banshee started and warmed up all is well . First kick every time after that BUT when I leave it sitting for a day it takes 10 to 15 minutes kicking it over to get it started . numbs out my leg . is there any tricks to kick starting my banshee or is there a problem with it .
  13. Hey guys. I have an 08 yfz450 that I just fully rebuilt, crank piston rings, honed the cylinder. I get everything back together and its only got 50psi worth of compression. after a lot of frustration, i narrow down the leaking noise to the space where the timing chain is. Here is what I think it can be, 1. leaking headgasket 2. leaking base gasket 3. leaking rings. I'm thinking its the head gasket because it was a pretty obviously leak, and sounded like it was coming from pretty high up in the cam chain space (indicating head to cylinder seal) if it was either of the other two, it would have to leak out into that crankcase first, then up through the cam chain space. I torqued the head bolts according to spec. 22 lbs, back out 14 lbs, then two 90 degree turns for a total of 180. for the record i thought this was very tight. I used a torque wrench just for the leverage, and set it to 60 so it wouldn't click, and one of the times it did. that seems like way too much. Guess my question is, can a head gasket be that crappy it just leaks, or did I do something wrong. any thoughts? thanks, sorry so long
  14. Starting system worked, rebuilt engine and put back in and now the start button does not start bike. I can jump relay and start it. There's 4 sets of wires going into relay from the wiring harness. Front 2 are red and have continuous power. Rear left is blue rear right yellow with black. I know the start button is working. If I put power test light on and push start button both the rear wires light it up. I'm assuming to complete relay circuit you need a power and a ground. So I assumed the blue wire was from start button and sends ground signal. So I put power to the yellow/ black wire and it started as it should. But all the schematics I've seen have them both being grounds? I can't read schematics for shit. Is the blue the signal from the start button? Is it supposed to be a power signal or ground? Same question for the yellow set of wires? Why when I add power to yellow wires does everything work? Lol I'm so lost
  15. alaska_racer9974

    Yamaha engine differences yfz450

    Good afternoon, I am looking at buying a new quad and the last time I was shopping was in 2007 when I bought my YZ250 and Raptor660. I kept hearing about all the problems with valve clearence on the YFZ450's and was wondering if the problem was solved. I was looking at the 2011 Raptor 700se or the 2011 YFZ450.
  16. Bucket69

    Yamaha temp guage

    Anyone know of a good temp guage that I can put on a Yamaha Beartracker? Had our "new to me" 01 beartracker out over the weekend and it seemed to get pretty hot. I was just wondering if there was anything out there that would allow me to know just how hot it is getting.
  17. does anybody know if there is a special tool to get the tamper torx bolts out of the lower frame. standard torx keep snapping off..
  18. jon1

    Yamaha anyone in east tex?

    looking for people 2 ride with.i live in jacksonville we have 2 of the best mud parks around,river run,and mud creek home of mud nats.send me message and we'll set up ride winter now sobring your thinsulated waders with rubber boots stock tires not recommended or bring a pull rope youll need it
  19. phixeous

    Yamaha JSR exhaust?

    Does anyone know anything about or is running the jsr exhaustand if so what are your thoughts about it?
  20. I just got a new top end with a wiseco piston. I broke it in the way I'm supposed to, but when I went to bring it into the woods, not rocky or roughf but it is just like an atv mx track, and I realised that it doesn't like hills, it bogs down in every gear but 1st. It can hill climb a short steep hill in any gear but the long and shallow hills I have to keep down shifting and down shifting until I'm in 1st gear which isn't very fast, so any help or advise would be great.
  21. cnrcpla

    Yamaha Cylinder bore question?

    I had someone I know take a look at my blaster cylender. I guess all it needed to be done is a good cleaning bEcause it looked like it had over heated. So I bought a new piston like the guy said and he cleaned it out with honer, but there is a very shallow dent type thing in the cylinder wall and he said that if I started it it would burn out really fast? Is this true or is it OK, or do I need to get it bored. Money is kind if tight so if I don't need it bored out that would be good
  22. chixwithtrix

    Yamaha Messed up piston ring? Argh!

    I'm rebuilding my 2006 YFZ450's engine with a Venom piston and OEM cylinder. Went to put the cylinder on yesterday and seems somehow the 2nd compression ring got bent or burred on one side of the ring gap because it is now hanging up on that side. So irritated right now. Now instead of 'floating' in it's groove on the piston where you can easily slide it around, squeeze in and out when compressed, etc, the one side hangs up and seems to be caught on something. It will move, but with considerable force, not longer 'floats'. Its like one side of the gap got bent or burred, and that is slightly digging into the piston in it's groove making it stick in place. For example, imagine you are looking at a piston with the rings loose around it like they normally are before installing in the cylinder. If I squeeze the gap closer together on the 2nd compression ring at the ring gap when its installed in the piston, instead of both sides of the gap being gently pushed together and returning to the loose state when I stop squeezing, the one side stays where it was compressed and the other side of the gap returns the ring to the loose state. The one side catches in its groove. I thought that would be an issue if installed since it might not function correctly and cause blow by. I figure if I sanded or filed on the top and bottom edges of that gap that would remove the unseen issue on the one side, but I'm not familiar enough with tolerances, etc of the rings and don't want to compromise a $1500 build just because of this ring issue...no matter how much I wanted to ride today...I'm just not sure what to do. Is there something I can do without harming anything or do I need to order another ring set?
  23. tdiliplane

    Yamaha my first hybrid build

    Hey guys i just bought a 99 banshee roller. its in ok condition. i bought a it400f awhile back and its just been sitting around and then i found this roller for a real good price ($250) so i have a lot of free time to mess around with this bike. my question is, what are the first things yous guys would do to thins frame and what kind of mods could i do to the engine? i was thinking of using a Mikuni 38 mm carb. any suggestions? what type of exhaust could i get (something quiet) i think im just going to stick with the stock suspension. like i said any input would be greatly appreciated. thanks alot. tom oh and i was wondering, the 400 is air cooled is there anything i can do to keep things a bit cooler?
  24. stmpjumper01

    Yamaha Valve Shim Info

    I can't post this stupid chart, so if you want to know the info, just email me at:mwr2452@yahoo.com and I'll send it to you. It applies to all YFZs, and YZ-F's. And WR's Stumpy
  25. nickyd111

    Yamaha raptor 660 Track use?

    is a stock raptor 660 good for track use, becuase i was thinking of racing but i need an opinion if this would be a good quad.