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Mike if you don't find what you're looking for I have a 45 tooth bottom sprocket (Venom Products) that would work with a 90 link chain, have converted a couple of Thundercats that way.

Its an Ulmer helix, but it looks like it's mixed & matched parts on the springs & weights.

I've used 1050cc injectors on a SR Viper once, it took some time to get everything lined out, but was doable. I did lower the base fuel pressure down to like 36 psi to help size the injectors down and then built the base fuel map from there.

And if you don't want to buy a "complete kit" and want to buy just some individual Oilite bushings and make those bushings last 3 TIMES longer than the OEM bushings, you can do that too...

There's simply not enough interest in producing them. In order to get costs low enough to make the product pricing decent I have to build 100 kits. That's a 10 year supply of inventory.

Bushing kits are back in stock, I left the pricing alone for now, my price did go up, but unlike the rest of the world, I DID NOT pass it onto the customer!

If you look behind the primary clutch at the head gasket area, you can see distance between the block and head. A stock head gasket is about 0.020" thick, most shims are 0.060-0.120" thick, you should be able to see the difference. Also if it has been shimmed and studded, it will likely have a...

Make the plenum as big as you possibly can. To small of a plenum will result in supersonic air speed which causes the air to be heated. You need a plenum twice the volume of the engine cc.

Gun drilling can cause areas of fracture due to the marks left internally from the drilling process. It is also very hard to drill an already manufactured shaft due to the fact that it is very difficult to keep the drilling centered perfectly in the shaft. Micro Belmont used to gun drill...

Measure the width, if it's 3/4" wide then it's mistakenly marked, it's a 8JP chain (SR Viper) and is narrower. The Sidewinder chain is 7/8" wide.

The 2007 Phazer wiring harness is different than all the 2008-2018 units if I remember correctly. I can do some looking, but I may have a PCIII for a Phazer, I'll post back.

Have steering blocks in stock for the Japan made 4-strokes. I worked on and built a few for the Yamacat models, but have decided not to pursue that at this time.

Oilite bushings.....when is the cost to buy to high?? With this wonderful world we live in, the cost of goods has become outrageous! Some of it comes down to volume as well, the bushing kits for the older 4-strokes don't sell as many as they did 10 years ago, but I hate to discontinue the...

By ISR rules you are only allowed to run in the open class. The Pro Stock Turbo 1000 only allows the OEM IHI turbocharger that comes on the Arctic Cat or Yamaha sleds (1100 twin or 998 triples). Any other supercharger/turbocharger is designated for the open class only.

You have to give Polaris credit for their willingness to push the envelope and bring technology to the fore front. Just think, in 2003 Yamaha decided 2-strokes were dead. We're now at 2022 and the 2-strokes are still alive and strong. The VR1 with boost will be a GREAT trail sled. 190 or...

They are typically only race only and I know Greg doesn't have much inventory left on hand. Greg @ GNS does beautifully meticulous work!

If anyone is interested, I have 9 bags of 96 count of Woody's Megabite 1.325 studs with nuts left in stock, this is what I use and have good luck with on SRX & Thundercat tracks. I like to use both doubles and singles, depending on quantity of studs. 96 pack of 1.325 Woody's Megabite studs...

Actually I believe CVTech makes the clutch.

2007 was the first year Yamaha put the Proactive CK rear skid in the RTX models. They ran that skid in the 2007, 2008, 2009 Apex RTX models.

It sounds like the flash didn't download properly. This can happen from time to time. Only way to fix is to reflash the ECU.