Power Valve - Different in each barrel???

**Tue Jan 04, 2011 3:09 pm » Post: #1 » Download Post**

Hi there!

Can anyone shed some light on the difference between these power valves? I was thinking i might try dress up the uglier ones to suit.

Valves on the left came from the bottom barrel, ones on the right the top.

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Cheers,
Dave.

**Tue Jan 04, 2011 3:51 pm » Post: #2 » Download Post**

One is late spec SP (left) the other R spec (right).
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If I have to take the carbs off once more...

**Tue Jan 04, 2011 11:46 pm » Post: #3 » Download Post**

Thanks. So is i possible to machine the R spec one to match the SP specs? What are the implications of leaving the SP and R spec ones in the bottom and top barrels respectivly?
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Cheers,
Dave.

**Wed Jan 05, 2011 11:54 am » Post: #4 » Download Post**

Allright, so i cleaned the "R" ones up a bit, result is below. The only thing remaining is the hight of the front of the valves, the SP ones seem a little taller.

A few other angles below;
Pic 2
Pic 3
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Cheers,
Dave.