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Similar Forum Topics
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By PIYIRIO
Hi all - I recently had a shop fix this quad and it hasn't been right since. The jug was resealed as it was leaking, the rings were replaced, and the valve stem seals replaced. Shop said the cylinder walls were great so nothing was done there. The motor still smokes, heavily on startup and all but quits once warmed up. Enough that I can live with it if I can fix what I came to ask about. I mentioned this work because since I've gotten it back it seems like it has power but tops out at a much slower speed than before. It's old so I don't have a speedo but I pulled out my phone at it tops out at 25 mph. I know before the work, I was getting up to 45+ mph... It's so bad, my 10 year old daughter is pulling away and straight leaving me in the dust with her governed Polaris 90.
Given the work done, what are some thing I could be the cause of such a drastic difference? I immediately thought timing but the marks appear to match up with a youtube video I found... no idea if it's correct though. It sat in another shop for 2 months and they gave me an $800 quote just for the starter... it pull starts fine.
FYI: I would take it back to the original shop to figure out but I had some issues that make them a no-go for me.
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By DayBreakJim
So my latest wheeler is a 04 Yamaha Bruin 350. It had all the wires cut from the stator and a few others and no wiring harnesses. The previous owner had them all twisted together and the bike neutral light would come on it would start (hard to start) but then would idle fine. It would die when you gave it gas so I soldered all the wires together and went on inspecting assuming it was a carb issue. Later after the carb was cleaned and adjusted I got this (see video). The bike would want to die anytime you gave it gas and there would be this horrible knocking sound but only when you gave it gas. I was worried it was the rod bearing and electrical still messed up somehow.
Upon further inspection of the wires coming from the stator there was a W/R wired to R and a R wired to W/R. I switched them so they matched per the service manual (W/R to W/R and R to R) and the bike started right up, idled and revved out fine and the knocking noise disappeared. This was the problem the whole time. It was just really hard to tell bc the oem wires coming from the stator were so brown and dirty I could barely make out which was which.
Where the hell did that knocking noise go? and what was causing it?? Just racking my brain trying to figure out what it was so I know for next time but I can't make sense of it... Really thought it was the rod bearing but it didn't make the noise at idle so I was questioning it...Luckily I kept searching!!
20230725_171507.mp4
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By Ulfthednar
Just a quick test video while I'm learning to use my gopro (really, $250 discount I couldn't pass it up).
This is from my side drive to the top of the property.
The Dog loves the runs.
No snowflakes were injured in the production of this video.
https://youtu.be/tKjBFuHCkM0
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By Jim Denton
File limits have dropped for me. Down to 85 KB. I can only get my pics down to around 1.5MB. Have the limits changed because I'm a free member? This is on posts. I made an album in the pics section and wasn't throttled so hard. Just wondering.
Thanks, Jim
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