honda ns 125 re-jetting

[billybaggins]

Hi folks i had posted before about my 89 ns 125f and was advised on drilling the airbox, i was just wondering if i drill holes in my airbox in combination with the tyga end can im currently having put on, will i need to up the jets in my carb? only other mod over standard is carbon reeds, currently being fitted. thanks for your help

[Kickstart]

Hi

Yes you probably will probably need to rejet for the airbox.

Why are you fitting the end can? Unlikely to give any real extra performance (the restriction is in the expansion chamber I think).

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[billybaggins]

hi keith, the restrictor is out of the manifold now, just got the can as its cheap and the standard one is pretty rough looking, my plans are to get her sprayed so want it to look fresh. Do the jets have to be set up properly on rolling road or anything? just on a bit of a budget so may have to leave airbox as is, cheers

[Kickstart]

Hi

Too rich is safe while too lean risks engine damage. So best to get a selection of jets and start rich, working your way down. With the main jet you "adjust" it by changing to a different size of jet. The needle you can adjust the position to richen / lean the mixture while the idle fuel mixture can be adjusted with a knob.

What size to use I honestly do not know

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[billybaggins]

cheers keith. Also do you know how reliable these bikes are? And any idea of where to find a rear seat cowl? thanks for your help

[Kickstart]

Hi

Reliable on a 20 year old bike will depend a lot on how they have been treated and any tuning done to them. They didn't have a bad reputation, but were one of the first road bikes with a plated barrel so had a bit of a reputation for the costs involved when you did blow them up.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing