2 stroke guru's please enter

**SteveCZ28** · 01-17-2011, 08:02 PM

well i also know a guy thats parting one out. and said it ran great on the carbs he has

**310stanger** · 01-17-2011, 08:46 PM

Thats a good find man. Seems that carb just dumps a ton of fuel in that cyl causing it to revert back into the reed cage perhaps like another poster suggested. It sucks you had to take apart that motor that many times though. You are a pro at tear down now lol

Dont worry about the reliability of Yamahas or that motor specifically, the problem you are having is exclusive to your bike and freak occurence. Yamaha's are some of the highest quality machines made, and imo right up there with honda and BETTER in performance.

**mmciau** · 01-17-2011, 08:46 PM

With a two stroke, it is essential the crankshaft bearing seals are top notch. Any leaking through these will not allow the by-pass function to work correctly.

Mike

**SteveCZ28** · 01-17-2011, 09:04 PM

Originally Posted by 310stanger

Thats a good find man. Seems that carb just dumps a ton of fuel in that cyl causing it to revert back into the reed cage perhaps like another poster suggested. It sucks you had to take apart that motor that many times though. You are a pro at tear down now lol

Dont worry about the reliability of Yamahas or that motor specifically, the problem you are having is exclusive to your bike and freak occurence. Yamaha's are some of the highest quality machines made, and imo right up there with honda and BETTER in performance.

i only tore the motor apart once...had it apart in 20 mins, and back together in 5 lol...this is why i love 2 strokes. none of the cams or timing or valves to mess with...thats why i was so stumped on it. because theres only so much that can go wrong...i knew something was wrong where it kept cracking reeds, and actually called customer support for the company that makes the reeds and they said that too much fuel, or excessive crank case pressure can crack them. now that i know the carb is messed up, i can get another set of petal (oh joy) and get a diff set of carbs and finally get it out of the garage under its own power and see what a banshee is all about. im not worried bout yamaha and honda reliability..its the same thing you get between ford or chevy guys. all personal preference. theres a reason banshees are so popular or hold their value in almost gold. so yea i feel good about this purchase of it. now just iron out the tiny issues and have a sweet bike.

i also appreciate all the help/input i recieved on this also. nice to know people still help a brother out when hes stumped haha

**wheeliE-maxx** · 01-17-2011, 09:08 PM

I dread tearing down my '05 crf250 eventually. But for now the valves haven't moved and leakdown is perfect. factory freak I guess. I beat on it and weigh 215.. Very meticulous oil and air filter maintenance by me since new though
You have to take the subframe off to get to the carb. So I work around honda bog..

**SteveCZ28** · 01-17-2011, 09:09 PM

the banshee is kind of a pain to work on with 2 HUGE pipes getting in the way. so i tore off all the plastics, and the gas tank. which opens the room up alot on it. im actually excited to get to put it together again. i forgot what it looks like whole haha

**blue02Z** · 01-18-2011, 05:07 AM

Originally Posted by wheeliE-maxx

I dread tearing down my '05 crf250 eventually. But for now the valves haven't moved and leakdown is perfect. factory freak I guess. I beat on it and weigh 215.. Very meticulous oil and air filter maintenance by me since new though
You have to take the subframe off to get to the carb. So I work around honda bog..

they arent that bad, we had my bro's stroked and big bored to like a 291 or so. it was an '05 as well. also had hot cam's stage 2 in it. it pulled yamaha 450's down the straight and even killed a cr500.

**310stanger** · 01-18-2011, 12:03 PM

Originally Posted by SteveCZ28

i only tore the motor apart once...had it apart in 20 mins, and back together in 5 lol...this is why i love 2 strokes. none of the cams or timing or valves to mess with...thats why i was so stumped on it. because theres only so much that can go wrong...i knew something was wrong where it kept cracking reeds, and actually called customer support for the company that makes the reeds and they said that too much fuel, or excessive crank case pressure can crack them. now that i know the carb is messed up, i can get another set of petal (oh joy) and get a diff set of carbs and finally get it out of the garage under its own power and see what a banshee is all about. im not worried bout yamaha and honda reliability..its the same thing you get between ford or chevy guys. all personal preference. theres a reason banshees are so popular or hold their value in almost gold. so yea i feel good about this purchase of it. now just iron out the tiny issues and have a sweet bike.

i also appreciate all the help/input i recieved on this also. nice to know people still help a brother out when hes stumped haha

When you are in the meat of the powerband in every gear on a Banshee theres nothing like it. Unbelieveably fun. FMF fatty's or Toomeys wake the fuckers up something fierce too. Its crazy how much more power just pipes will do on a 2 stroke.

**310stanger** · 01-18-2011, 12:04 PM

i acknowledge the virtues of the modern 4 strokes, but I'm a 2 stroke guy through and through. Love the sound, power and smell. Always will.

**wheeliE-maxx** · 01-18-2011, 12:05 PM

Originally Posted by blue02Z

they arent that bad, we had my bro's stroked and big bored to like a 291 or so. it was an '05 as well. also had hot cam's stage 2 in it. it pulled yamaha 450's down the straight and even killed a cr500.

the valves are supposed to be crap. It was the least powerful 250f for '05 aswell. Mine has some upgrades though

**blue02Z** · 01-18-2011, 12:13 PM

Originally Posted by wheeliE-maxx

the valves are supposed to be crap. It was the least powerful 250f for '05 aswell. Mine has some upgrades though

Yep they hammer the seats pretty bad and make vavle clearances too tight. when i had my 04 crf450r i upgraded to kibblewhite black diamond valves. very nice

**HOBS** · 01-19-2011, 04:43 PM

So did switching the carbs work? If so wheres the video.......

**Cutlass** · 01-19-2011, 05:24 PM

Hey, what's you guys' favorite 2 stoke oil?? Amsoil?

**wheeliE-maxx** · 01-19-2011, 05:26 PM

Motul left the top end on my yz85 clean enough to eat off of. Wouldn't foul plugs putting around (even though it was way rich). Smelled good too

**Cutlass** · 01-19-2011, 05:39 PM

I occasionally hear good things about Motul. Its definitely on my "Might Try It" list

**wheeliE-maxx** · 01-19-2011, 05:51 PM

Ran amsoil for a while, just because. Worked fine too. Yamalube is some nasty mess. Ran some castor just for the smell once

**Cutlass** · 01-19-2011, 05:54 PM

I currently run Yamalube in my waverunner, but I wanna switch to something else. Whats wrong with Yamalube?

**wheeliE-maxx** · 01-19-2011, 05:56 PM

Excessive drooling, smell. Not a problem in the water

**SteveCZ28** · 01-19-2011, 07:27 PM

Originally Posted by HOBS

So did switching the carbs work? If so wheres the video.......

yes switching carbs worked...but it still only runs on 1 cylinder....i have a bad carb. looking for a set of carbs for it currently

**SteveCZ28** · 01-19-2011, 07:39 PM

Originally Posted by 310stanger

When you are in the meat of the powerband in every gear on a Banshee theres nothing like it. Unbelieveably fun. FMF fatty's or Toomeys wake the fuckers up something fierce too. Its crazy how much more power just pipes will do on a 2 stroke.

haha whats cool is i have a full set of fmf's for it...fmf fatty pipes. and fmf silencers...then a nice fat set of toomy's, and ill run the fmf silencers....sounded sick in the garage on 1 cylinder cant wait to hear the 2...thats why i loved/miss my snowmobiles the big twins sounded like sex when piped or canned...so im anxious for this banshee. and i will definatly get a vid of its first fire up on both cylinders and running at 100%