Exhaust help...

[juancojones]

Hi, Only discovered this forum today from a link on another forum. Good to find you

And here goes, really hope someone can give some advice as desperate to get my scoot (PK80s) back on the road as until this weekend I use it every day to get to work.

When I bought it it had a Leo Vinci pipe. This is noisy as hell though and finally I took pity in my neighbours and decidided to do something about it. So, I bought a Sito Plus, new gasket and an elbow came too.

Had an absolute nightmare fitting it. Some bolts not wanting to shift etc. Hands now bruised and bloody too.
I took the Leo Vinci off and put the Sito Plus on, but was difficult to get all the joins lined up well (exhaust to elbow, elbow to cylinder). Wasn't convinced the joins were that well sealed as a result. Started it up and running really fast, bit smokey too and obviously not right. Gave up as got dark and decided to continue Sunday.
Tried to refit the Sito Plus. Much better this time , not running particularly fast, rode ok for about 50m before cutting out whilst idling. Couldn't restart though it was sparking and possibly a slight loss of compression.
Finally, enough was enough and I decided to put the Leo Vinci back. Started ok and sounded much the same as originally, but engine died after about 30 seconds and same problems trying to start again.

So, basically my scoot is now off the road and I've no idea what more I can do to it. Surely just changing the exhaust and putting back again wouldn't have had an effect on anything else?
If the seals aren't quite tight is it possible to use two gaskets to fill the gap up?

Any advice would be really welcome, I need it back on the road quick before I waster more money on trains like I had to do today.

Thanks.

[Juan]

Great screen name fella. ;D

Dunno much about the Shito Puss as I've never had one on a proper bike but had a few on fat bastards.Never got along with them at all and the fit can be be worse that Simonini's.

Going on your syptoms it an air leak somewhere,and it could be you've knocked the carb settings or ignition timing unintentonally too although I'd doubt that on a PK.My thoughts are that you've nipped a gasket or not torqued the bolts down totally.

Out of intrest,was the new elbow a 90 degree or a free flow?

[juancojones]

Muchos gracias ;D

Only noticed a Juan on here after registering the name. It's your real name?

Thanks for the reply, been desperately trying to get help so appreciate it!

Reassuring that it could be symptomtic of an air leak I guess. Can't seem to torque the inside cylinder bolt down as much as I'd like to but got it as tight as I can without threading the cylinder holes, even when I put the Leo Vinci back on. Is using two gaskets a bad idea to try and fix this?
Sorry, but what's the difference between a 90 degree and a free flow? Well, it turns at a right angle (it has to!). Got the Sito Plus just 'cos I didn't want anything too noisy. The Leo Vinci is unbelievably loud.

Thanks again.

[Juan]

Are you suggesting I'm a liar or have something to hide? ;D

This is the derestricted elbow,SIP do them,maybe SCK and Polini used to do one but I've not seen them in years.


I've been thinking about this and rereading it sound like your oil seals could have gone,sorry about that.I'm not saying they have but it's a strong possability.Try the 2 gaskets first and see if that improves matters.

[juancojones]

Not at all

Hmm, other than the fact mine's black I'd say that elbow looks pretty much the same.

Been speaking to someone else and they seemed to think could be some serious damage too. Will try the two gaskets I guess and see from there.

So, forgive my ignorance but how can something like the seals go when I make what in theory is something as simple as changing the exhaust?

Anybody got any suggestions of what's a good price to get the the seals replaced by someone? Some right ripoff places here in London.

Thanks for the help, much appreciated.

[Juan]

Changing the exhaust won't knacker the seals but they can and will go at pretty much anytime.Like I said it maybe isn't them but it's a decent bet.

Depending on your location there's a few members here who're "reasonably" close to you or could offer advice on a decent shop if they're too out of your way.

[juancojones]

Thanks again Juan. A few things to think about.
I'm in N London (nr Archway) if anyone fancies giving some advice or recommendations of someone to get the work done.