Clinician
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Joined: Jul 5, 2012 14:21:40 GMT -6
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Post by methogod on Jan 11, 2013 8:30:30 GMT -6
GY6 150CC only 900 miles, had a broken screw head on the exhaust so we had a local CL guy fix, who didn't want to make 2 trips, and re-used the old seal. Held for the summer, but started leaking oil at the base seal. Took it to a "LEGIT" bike shop, asked them to fix and give the bike a once over. Said it would be 3 days, took 7 - they fixed replaced the seal, replaced the shroud cover (was missing due to huge holes) and got it running much better - not spraying oil. OK, so we get it back - i don't ride it much but my employee who has a few too many tickets and DUI's does and is using it just to and from work. I want it to be reliable as best it can be.... plus the fact i have a few hundred into it already. Now it idling high, at 3000ish, which doesn't matter to me - if that's how it should be, but when riding it's topping out at 50MPH, at 5000 RPM it just has a dead spot, no more power no additional rev's. Almost like a governor, but we know ROKETTA doesn't know what a governor is. So we (my other employee who is good with bikes and what not) finds some issues with the idle not being set right, just wants to run HIGH. if we lock it in lower it will cut off. Before the bike was at the "real shop" it would go 60-65 no problem, just had to keep putting oil in it Now 50 is tops, they claim now that the compression and back flow pressure is set right its where it should be. Another neat fact is that when you have it on the kick stand you can run it up to 8000RPM....
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Scooter Doc
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Joined: May 5, 2012 14:05:15 GMT -6
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Post by rob63 on Jan 11, 2013 13:00:11 GMT -6
The idle should be around 1700-1900 rpm, at that speed the rear wheel shouldn`t be moving. Not sure how your bloke is adjusting it but if you look in the seat box there should be a small flap which you remove. You should then be able to view the top of the carb and the idle adjustment screw. As for the topping out on speed, you may have worn rollers in the variator, sometimes they wear flat at one point and stick in the variator galleries. It`s worth taking the belt cover off and the variator and giving it an inspection. As an afterthought the shop may have messed around with your mixture so it`s worth checking that as well, here`s a link to help scooterdoc.proboards.com/index.cgi?board=intake&action=display&thread=1499
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