Exhaust again

[stephena]

Thinking of fitting a scootopia 42mm clubman to gp 125 with a 150 top end. The question is will I find much improvement in performance and will I need to rejet the carb. Thanks any help appreciated.

[rossclark]

The 150 will pull a bit better than a 125, the exhaust will let it meet on a bit better still.

You should check your jetting with a few plug chops as it likely will need adjusting.

[stephena]

I already have the 150 top end on reading my post that wasn't perhaps clear. The original exhaust is looking a bit batterd and I have only read good reports on the scootopia one so hope they are worth a try.