SOURCE: no problem just done top end rebuild
turn the tick over screw on the carb not to much and make sure the back wheel is off the floor and start the bike and let it tick over in forth gear for a while
SOURCE: Cam position sensor error.
It's not enough only rebuild yours engine !!!
After new camshaft position sensor instalation and timing perfectly alignment you must scan the engine control computer and erase these error, actually all errors stocked in memory. The best scantool is VAS device used by VW-Audi dealers, VAG-COM by RossTech (cable + software 704.014, 805.01, ... on CD), or also Bosch KTS 540, 570, 670, ...
RESET = erase errors from the engine control computer memory !
Yours engine control computer don't understand if you only replace damaged sensors with new others! Errors still remains in memory affect engine runing!
Best regards!
SOURCE: Yamaha Pewee 50 Has no top end
Absolutely,First thing to do is check to see if the throttle restrictor screw is unscrewed all the way or removed,its on the throttle barrell.Next pull off the exhahst+muffler,they separate in the middle.Look at the exhaust gasket to see if there is a restrictor washer attached to it if so remove the washer by gently prying off with a screw driver.Next look up the exhaust port and check for carbon build- up. While youre there check the piston to see that it hasn't seized(yes they do somtimes still run after seizing but just not well)Also check exhaust pipe where it connects to the cylinder to see if its choked with carbon.Clear these blockages,by scraping/burning out,also same at spark arrestor in the Muffler and muffler connections.99 times out of 100 one of these suggestions will fix your problem(except if you foud it had suffered seizure/worn piston when you checked it)
Regards Andrew Porrelli
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