valve

I recently rebuilt both of my carbs for a 96 GTI with the OSDMarine kit that specifies no need to set popoff pressure (return to OEM kit i believe). At the time I rebuilt my carbs I thoroughly went through and cleaned everything. Yesterday, I started the engine fine by pouring a splash of gas...

Hey folks. New here. Just got myself a 97 speedster twin 85s. I have a bad scupper valve. As water comes in when I’m sitting still. My research from forums say I need scupper valve. But the only thing I can’t find is how to change it or where it is even located. I am pretty good at DIY. but...

DONT BUY rotary valve from “bay area motorsport” on EBAY! Just got my new valve and wont fit! I have to hammered down use a screwdriver to push the notches into place... and it is little thicker than the original... making loud noise and pressure.... i using my old one...

Hi, Yesterday I took my 96 gtx out and it was only revving up to 5000 rpm it was perfect and normal until it got to 5000 rpm then it wouldn't go any more. I decided to turn the rave valves in with the red cap and I started it and gave it full throttle and it went straight to 7000rpm but after...

Machined Aluminum Rave Caps for 787/ 800 motors! Replaces the Threaded Upper part of the Rave Bellow that melts with high exhaust heat made to have a higher heat tolerance than the stock plastic piece $30 for a pair! PM me if interested!

I just put in new rave valves after rebuilding the engine (piston locked up). The ski runs great, however after only 1 hour of running, the brand new shinny rave valves are really dirty/black! I cant imagine all this buildup, so fast, is good for them. Or is this normal? I am using Pennzoil...

Just wondering if anyone with experience in 787 rebuilds can tell me if the rotary valve worm gear from my engine looks worn. It doesn't seem right to me. The teeth of the gear are sharp almost knife-like. With the crank in the case, there seems to be a lot of back and forth rotational play...