piaggio zip stage 6

ima buy the 4.5 gramm and what clutch springs should i buy ? medium ones ?

 

well ive finally done it, changed the barrel and piston for a slightly oversized and tried that with the after market filter and no joy. so i uped the needle 3 notches and put the standard filter on with standard exhaust and she ran like a dream. runs a little rich but im going to put the stage 6 back on and upjet her to size.
thought id go back to basics and work up from there and il keep the standard filter on this time. ive got some 4.5 roller which will add to once its back up and running.
happy days eh......

 

if i red right you sed you had a 60 jet in the carb and was bogging out at full throttle but wen u put ur hand over the carb it ran much better did u have the airfilter on because it will bog without it on. wen the airfilters on if it still boggs with a 60, upjet it untill it dont bog. you might find 4.5gr rollerz are too light.

 

i havent ordered any of my things yet but like still got my pipe on and i was riding down this road flat out about 45-50 and all of a sudden it cut out but started first time and also after that it isnt going over 35 anyone got an idea what it could be ????


ordering a stage 6 variator + set of polini clutch springs + 62 jet

 

I did have a 60 jet in with the stage 6 and aftermarket airfilter but like i said it boged out when you opened the throttle more than half way.now I have the standard filter on and exhaust with a 56 jet and it runs like a dream, so now that its ok will put back the stage 6 exhaust and try a 60 main jet with standard rollers just to see what i get and go from there.

 

your right, ive tried the stage 6 pipe with standard air filter and rollers (7.5) and although it runs ok she takes a little longer than norm to engage the back wheel. ive hopefully got a set of 5.5 rollers coming tomorrow so will try them. the only other thing is does anyone know if its worth adjusting the needle, its on level 2 of 5 from the top and just thought id ask first. i know the carb needs tuning a bit more so will do some reading up on that.

 

ok now im confused, ive put my stage 6 exhaust back on and ive uped the rollers to 5.5. the carb, ive adjusted the needle to the 4th mark outta 5 and ive uped the main jet to 60 from 56. the plug is running rich so ive dropped the needle to 2nd mark from the top. now that ok the plug is good and the air mixture screw is 1 3/4 out and she ticks over nicely. but when I pull away shes not that fast untill it picks up then she off like a whipet.
the bit that gets me is the book says pilot jet 38,main jet 70 and needle a15.
and thats from the haynes manual twist and go (4082). my pilot is 32, main 56, and needle is a22. so im not sure which is true as I thought my carb was standard.
any ideas guys.

 

not at the mo, but I have some polini ones yellow gren and blue. just not sure which ones to put in.
ive noticed the stage 6 exhaust has a bigger bore diamater on the flange port that connects to the cylinder than the standard exhaust. would that make a differance or am i barking up the wrong tree. some people tell me that the exhaust wont make a differance and some say its all about the expansion. I know im still learning but I do hate it when I get all these differant storys. :banghead:

 

the expansion chamber (which is the bit that gets wider on your exhaust) is wat gives you the back pressure that 2 strokes need and the size of it will depend on the rev or torqure of the engine. if that helps you under stand more of what that does.

 

thanks for that ive had a few read ups and I think im getting the idea.

 

ok all, just started me bike the other day and im getting a screach from the engine and im now finding it hard to start. it use to start really easy, and im getting spark from the new plug. defo fuel getting through and ive taken the head off and checked the piston and bore. they are all good and clean,also checked the crank con rod for play and up and down there is no play and just a bit from side to side.
ive taken the drive belt off the variator and kicked her over and she did run for about 10 sec then died but she screached as i revved her up slightly. im thinking maybe bearing but when I took the head off and barrel to check for wear I moved the con rod in and out and it did seem smooth, so im at the stage of scratchy head to whats the problem. cratch:

 

the belt to me looks ok, and ive tried running it without the belt attached to try to elliminate as much moving parts as pos and without the belt on I still get this screeching noise when i get her going. the seals dont look as though they are leaking although the one on the variator side does look damp. how can you tell if the bearings are gone is there a good indication.....?

Mike

 

thanks for the help, was thinking of spliting the cases and seeing what the bearings look like as thats all I can think of at the mo. is there anywhere i can buy the tools to split the case to get the crank out.....?