V-Force 3 Reed Valves

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ian wright
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V-Force 3 Reed Valves

Post by ian wright » Sun Apr 14, 2013 5:01 pm

I've just managed to fit a set of 3 Yamaha Banshee / YPVS 350 reed valves to my trackbike NS475.

It involved quite a bit of grinding out of material from the inlet castings to squeeze them in but looks like it will work well in conjunction with, bored inlet rubbers and NSR250 32mm carbs. To avoid having to bore too much out of the manifolds and avoid them splitting I've machined the outside of the carb stubs to reduce the external diameter so they fit easier.

I should be doing some dyno testing with this set up in the next few weeks so will be hoping to better my best bhp figure of 84 (my road bike, with standard reeds and carbs) to ??

Cheers Ian

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Re: V-Force 3 Reed Valves

Post by Seacoast69 » Sat Apr 28, 2018 9:28 pm

How did this end up working out ?

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Re: V-Force 3 Reed Valves

Post by OZZYSBIKES » Sat Jan 26, 2019 9:03 am

It would be interesting to know the outcome as there’s several alternative reeds for power valve yams,

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