125cc motorbike tuning questions

[orange71]

never seen one of them before. Illegal for a learner, but a nice 125.

Another good learner legal 125 is the Honda Varadero. Another big big bike, twin cylinder. Prices start at around £900 in my experience.

 

[Rich Aitch]

The Cagiva is limited to 15 'by default', very easy to remove or add as merely a restrictor on the exhaust. I think I recommended one before on here!

Um, that must be the Supercity right? Because derestricting the Mito means cutting away the airbox "Snorkels", re-jetting it, blanking off the torque amplification chamber in the exhaust header and fitting a sprocket with a different number of teeth.

 

[orange71]

yes - the ebay one was 30bhp

 

[Rich Aitch]

How could fitting a different sprocket be anything to do with de-restricting it?

Dunno, but it's in the workshop manual. It's either a 13 or 14t on the front.

 

[orange71]

well, back to the original post, I'm getting an 18t front sprocket to replace the 17t standard one and I'll be cleaning out the air filter and putting a couple more psi in the tyres. I won't be tucking my head down. I can't be bothered. £8 total for hopefully a few more mph on a still day. That'll do me for the time being.