So ive decided to buy a cheap sports exhaust for my mbk mach g 50.. At the moment i have a 72 main jet and with a sports exhaust i know your spost to up jet as im derestrcting the exhaust. The rest of the peds standard so what main jet would i need???? Comment please btw the exhaust is a Tecnigas Q-Tre . Thank you.
Hi I'd start by getting a box of jets from 70 to 100 and I'd put a 90 in there. It's going to be too rich - so reduce by fives until it runs right then go up two - or down two - until you get a nice chocolate plug and good performance. The Mach G has the same engine as the ovetto (my scoot) and from experience I'd suggest getting the hardest clutch springs you can lay your mitts on - and reducing the rollers to about 24 g total (but this is a wild guestimate and as good as useless in terms of advice). I bet you'll end up with about 82 - 85 main jet but again - this is worthless (and possibly dangerous) advice. You have to jet big & reduce. Good luck -
The most frequent analogy is 'brick' coloured. If you're 'light ginger' I'd upjet by two points - and see if performance suffers. You want to jet as rich as you can without a performance penalty.
