joesbanshee618 Posted September 14, 2023 Report Share Posted September 14, 2023 Ok so I recently replaced both intake boot on my 98 yamaha banshee. I pushed it out to start it and it fired up with choke on then died I turned the choke off and it fired right up. I revved it 2 time to about 1/4 throttle and on the second time it made a loud popping noise and revved to full throttle. I turned the key off and it shutdown. I pushed it back in the garage and pulled both carbs and intakes off I checked the reeds witch are stock reeds and cages and they are fine. I noticed that the left cylinder base gasket was wet so I pulled the cylinder and it didn't seal good. I'm going to replace the gaskets is there anything else that I should check. It's a 65.00 mm piston with a 4 mil stroker crank, stage 4 exhaust and not sure about the silencers but they look like they could be fmf but not sure. I don't have tores or parking brake, I have installed a teather kill switch. Any help is appreciated Quote Link to comment Share on other sites More sharing options...
ClaudeMachining Posted September 14, 2023 Report Share Posted September 14, 2023 Ok so I recently replaced both intake boot on my 98 yamaha banshee. I pushed it out to start it and it fired up with choke on then died I turned the choke off and it fired right up. I revved it 2 time to about 1/4 throttle and on the second time it made a loud popping noise and revved to full throttle. I turned the key off and it shutdown. I pushed it back in the garage and pulled both carbs and intakes off I checked the reeds witch are stock reeds and cages and they are fine. I noticed that the left cylinder base gasket was wet so I pulled the cylinder and it didn't seal good. I'm going to replace the gaskets is there anything else that I should check. It's a 65.00 mm piston with a 4 mil stroker crank, stage 4 exhaust and not sure about the silencers but they look like they could be fmf but not sure. I don't have tores or parking brake, I have installed a teather kill switch. Any help is appreciated Do a pressure check before putting it back in tha frame.Envoyé de mon SM-S908W en utilisant Tapatalk Quote Link to comment Share on other sites More sharing options...
Jereme6655 Posted September 14, 2023 Report Share Posted September 14, 2023 You either hung open your carbs, or created one hell of an air leak. Definitely need to do a leak down test any time you remove anything with a seal/gasket that deals with the engine…..at least for safe measures. Quote Link to comment Share on other sites More sharing options...
joesbanshee618 Posted September 15, 2023 Author Report Share Posted September 15, 2023 17 hours ago, Jereme6655 said: You either hung open your carbs, or created one hell of an air leak. Definitely need to do a leak down test any time you remove anything with a seal/gasket that deals with the engine…..at least for safe measures. I plan on it. Just trying to have the parts to fix it so I don't blow it up Quote Link to comment Share on other sites More sharing options...
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