Scooterotica

My S3 Lambretta runs an SX150 engine with (so I was told when I bought it???) a 175 kit. The carb is a Dellorto SH1/20 (don't know what the jets are).
I fancy a new exhaust, more for the looks than any performance gain. Would fitting a ScootRS exhaust have any adverse effect? Or would I need to increase jets/carb size?

you really need to establish what your existing set up is before deciding on another exhaust.

Is it 175?

What jets/ atomiser/ slide etc etc

Chris

OK further to this my carb settings are as follows -

Slide - 5914-1
Atomiser - 5899-2
Main Jet - 106
Pilot Jet - 45
Stater Jet - 50
I haven't taken the barrel off to check so let's assume a 175CC

Any help will of course be greatly appreciated.

that's jetted for a TV175 S3 apart from the starter jet which should be a 50.

That being the case' if you're looking for a tad more performance I'd up the starter to 50 and slap on a 42mm Clubman ( you may then need to up the main to 108- try it and see)

If you're only concerned with looks why not fit a chromed Indian Big Bore, which apparently perform better than a 42mm Clubbie.

Alternatively go with the ScootRs pipe, but you should then consider fitting another larger carb.

Regretably "the world is your lobster" with exhausts/ carbs......

Chris

Thanks Chris.

bristolmod wrote:that's jetted for a TV175 S3 apart from the starter jet which should be a 50.

That being the case' if you're looking for a tad more performance I'd up the starter to 50 and slap on a 42mm Clubman ( you may then need to up the main to 108- try it and see)

If you're only concerned with looks why not fit a chromed Indian Big Bore, which apparently perform better than a 42mm Clubbie.

Alternatively go with the ScootRs pipe, but you should then consider fitting another larger carb.

Regretably "the world is your lobster" with exhausts/ carbs......

Chris