need help

Hello yall backstory here i traded my 1996 cr125 for my current 2006 crf250r. The bike had low compression and the shims where off spec so i decided to do a top and bottom end rebuild installing Wiesco piston,WIesco rings,Stage 2 cam,hot rod crank,Boysen clutch etc all the good stuff a bike...

I have a 1982 yamaha It175 that i’ve never seen run. I recently replaced the top end on it. It has spark, compression, fuel, and air. I cant think of anything else to check on it. I’ve sprayed gas directly into the cylinder and it shows no signs of life. However; sometimes when I’m trying to...

I have a 1982 yamaha It175 that i’ve never seen run. I recently replaced the top end on it. It has spark, compression, fuel, and air. I cant think of anything else to check on it. I’ve sprayed gas directly into the cylinder and it shows no signs of life. However; sometimes when I’m trying to...

Hey guys I was riding my xr and she made a crunching kind of sound and died on me now has no spark at all, was thinking the magneto or coils but not sure witch one or what ever was hoping someone could shed some light. Cheers in advance

I have a 2001 kx125 this is running what pro Circuit recommend for jetting (I have a platinum pipe), but the bike seems to run rich in the low rpms and then up top it seems to have sudden surges once in a wile when I do a pull. I don’t want to ride the bike if it is going to damage the motor...

Okay I have a 2003 ttr125 when I first got it it bogged like crazy so I put a new carb from eBay on it and filter and plug it will run but still bogs at full throttle I've tried everything and had alot of people try to help my bike is completely stock also someone please help

me and a buddy was out riding trails that are thick with sand and are also some decent dirt trails. I was riding a 98 CR250R Power Band. Granted I was giving it hell. Usually we would stop about every 30 minutes to give the bikes a rest because it's hell on them in the sand, plus it is tough...