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Wanted to buy speedwerx exhaust manifold riva made some too that were short like speedwerx message

I’ll let others chime in that own newer aftermarket cylinders: here is what I know and seen: Some dudes (few pros I know) use race port timing Some dudes use oem timing just wider ports Most of have no clue what they have it’s usually just similar to oem but wider These timing specs are about...

For sale: 61x cylinder setup as flattop 85.5mm bore Dimensions are approx with calipers Cylinder 114.5mm Exhaust port 36.7mm 187 degrees Transfer pet 54.3mm 121 degrees Exhaust port width 56.5mm Transfer bottoms raised up and all larger than oem Sleeve diameter at bottom 89.5mm (86.5 ok)...

Wiseco use to make 90mm pistons for this. They were custom. Back in mid 00’s many guys had gp1500’s. I had at least 5 or those pistons. groupk Still has 87mm also look at Polaris large bore sled pistons. the sledshop? Carl’s cycle too

Blaster stock pump shoes are different than superjets. They are longer. Most that break replace with superjet pump shoe. The back of a superjet grate won’t fit a blaster shoe and hence the front doesn’t line up either.

No

Sorry don’t have extra 33 same domes: watcon, umi, speedwerx, blowsion, Kommander, JSU, greater yamaha, wamilton, East coast, Protec, Rius racing, prodesign, savage, and others I forgot over the years.

I think I may have an extra set. Let me check today they are still available brand new from ProTec if you desire brand new (same dome).

For the average plug and play guy buying one of these, is 56 the static angle for the oem 760 wheel and cover?

#1 reason fuel economy where we ride #2 experiment and curiosity #3 I had 44’s on the ski and it hit harder and pulled over 100+ rpm More. Fuel economy was significantly worse when riding “aggressive” #4. When I was racing I always rode with 48’s on my limiteds and 50’s on my supers. Now that...

Woke up and decided to watch mxgp and cc some more oem superjet heads. One head off a 2017’ silver and other head off a 1996 gray I think. 31mm thick so no decking. Sanded with 800grit to clean and ensure seal with thin baby oil. Oem spark plugs and yes they filled the cavity. I used...

Oh another note. Much more sensitive to needle turns than Yamaha Superjet oem 38’s. The Yamaha superjet oem 38’s are hard to screw up as 70/130 jetting works on about 95% of every combination imaginable.

Update. I put these 38’s finally on my sj. They had drilled out return restrictor so I had to run a jet. Ended up at 85. Smooth idle I only had 70/130 jets on my and I will say they were rich compared to Oem 70/130. I think 65 or 67.5 and 125-127.5 will be perfect I pulled 50-60 more rpm...

That’s serious old school

The msd plates are not 180. I complained years ago about this. it was a way to retard the rear cylinder. Assuming you use the retarded pickup for rear. Most plates I’ve used were made 98-05 time period. ALL had one about 3 degrees off

Yes. RAD made them and sold them under RAD name and Riva.

Just go online and order them from Yamaha oem parts.

Most I’ve ever worked on or had used Kawasaki flat tops. 76mm stroke rad crank with 132 rad rods or KTM 132 rods (many were that exact dimension or close)