t5 bogging in 4th gear

[dilan]

hi hope someone can help i have a standard vespa t5 with pm tuning pipe on and every time i put in 4th it drops from 50mph to about 45mph and just wont go any faster i have a 112 main jet if it help, it flys through all the other gears no problem but its just 4th where it bogs hope some one can help cheers .

[bazman]

Best way to cure it is bin it and get a sitoplus/standard exhaust lol, seriously PM are terrible on t5's never seem to get into powerband which seems the problem you're having?

[roadrunnerian]

Dilan is this turbo terrys old t5 what happened to his old exhaust this scooter was quiet fast for a standard.i would put a sito plus like the man says

[dilan]

he dident have standard exhaust on it its was a sterling one but i couldent fit my spare wheel on with it but it did the same with that on.c

[philhnottm]

Sounds the same as every malossi 210 engine ive had.

Lots of threads on the subject it appears a common issue

[goldeneye]

just stick a standard or sito plus on it. its not getting "on the pipe" in 4th. a lad at work has just bought a mint T5 millenium (and i mean mint, 500 mile job) and he wants to change the exhaust. ive asked him whats wrong with the original....."it just looks like a black box".........and there lies the problem, people go for looks over go go power. if you had a little black box that sucked as well as it blowed, and cost you nowt, you"d keep the fucka, no matter what it looked like!

[dilan]

hahaha well u cant even see this pipe so its not a matter of looks over power my old sterling looked better.

[LI150]

hi hope someone can help i have a standard vespa t5 with pm tuning pipe on and every time i put in 4th it drops from 50mph to about 45mph and just wont go any faster i have a 112 main jet if it help, it flys through all the other gears no problem but its just 4th where it bogs hope some one can help cheers .

When I had my T5 I bought a PM pipe for it and what a complete waste of money that was. The only way to get to pull in 4th was to rev its tits of in 3rd and maybe with a backwind and down hill I could get it to pull 4th. Ditched the pipe put a 172 kit on it and a sito plus and never looked back

[goldeneye]

malossi 172cc, decent cylider head, and the standard exhaust, before fitting any flash pipe.

[nelson pk]

A mate of mine has a similar problem with his T5. He put a shiney stainless right hand sterling on but it will not get on the power in 4th. I had several T5's in years gone by and tried the famous mickeck and leovinci and had the same issues with them unless a kit was fitted.
Does anyone know what a Simonini is like on a T5? Same problem or does it pull better?