Rally 200 drilling airbox

[storkfoot]

I have a standard Rally 200. The only difference from original is a SIP road exhaust and a 122 main (it may well be dropped to a 120).

I hear of people drilling holes in the airbox. To my eye, I can't see this making any material difference on my set up.

Any thoughts please?

[cartmel808]

I have same pipe & 120 main on mine with drilled filter... think from memory I drilled a 5 or 6mm hole in the heart shaped area on underside of filter (where it sits over the main jet)...


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[Norrie Bodge]

Do as likes this piccy m8

[storkfoot]

Thanks for that. Will that allow me to run a very slightly bigger main jet?

[Norrie Bodge]

Probably, try it but do some plug chops m8

[storkfoot]

Cheers. I'll give it a go.

[storkfoot]

Finally got around to doing this. I must say it does work. More torque throughout the full throttle range.

[paulnobodyimportant]

Next thing to do Paul, is put a Malossi 210 top end on. Plenty of torque right the way through the rev range

[cgt75b]

Then whack a 60mm Pinasco crank in it

[storkfoot]

Still on the original '73 piston believe it or not. I did treat it to new rings before I went to Europe on it last year though !