Post by pauliewalnuts on Jun 18, 2017 2:19:28 GMT 1
I'm a newbie on here and realitive novice when it comes to working on my scooter.
Within the past few months I bought a mid 80s non-kitted PX125 (non autolube) with a SIP 2 exhaust which I'm now having starting problems with.
It can sometimes take 15-20 kicks to start - even if it's only been switched off for a short time so I left it into a local scooter mechanic to check, he said both the spark and compression were good and has recommended replacing the SIP with a standard exhaust (it did start after 3 or 4 kicks whenever he disconnected my exhaust) but I would rather keep the SIP if possible - anyone offer any advice? Thanks in advance
The exhaust has nothing to do with the starting. If everything is good then it is just getting too much fuel. Check all the jets in the carb are 80's 125 spec and that the pilot jet is tight in the carb. If all is still correct then it is just the mixture screw is too far unscrewed. If it is an original 80's carb, it should be set near to 1.5 turns out from fully in.
With the engine running, set a fast tickover, then wind the mixture screw right out more than 4 whole turns. The tickover will drop a little lower now, so speed it up to about 1500 rpm again. Then slowly wind the mixture screw in until the revs really speed up, continue winding until the revs don't go any faster, then back out slightly. Turn down the tickover and check that it revs off from slow tickover without hesitating. Switch of the engine and check how many turns out the mixture screw is now set at. Should be somewhere near 1.5 turns if it isn't you need to come back here again.
PX200E with 221 Malossi, max power at 8300rpm, VHSH30CS, 175 main jet PX200E Tourer, tuned original barrel, SIP road II, SI26/26 135 main jet, vortex 1050cc Triumph ST 600cc Honda CBR
Post by pauliewalnuts on Jun 18, 2017 10:21:25 GMT 1
Thanks for your reply.
The mechanic reckoned my SIP exhaust was choked up and that's what was stopping it from starting. He recommended either replacing it with a standard exhaust or putting the SIP on a bbq for a few hours to burn off the build-up of inside it. As I said I'm a novice, does this sound plausible or bs?
overnight with caustic soda , the fire methods old-skool brit bike method .you need to be able to scrape away deposits with a bit of wire as pipes heated for it to be effective, not really a option with a box scoot exhaust .H
if its got wheels n makes a noise I wanna play with it, skateboards included coz "skate-punks rule",