Recent content by KnappAttack

I think you're gonna like the TAPP primary Allen. Adding weight to the bolt is still a pain as the cover has to come off, but it's not too bad, not as easy as having Dalton arms in the Yamaha primary for weight changes. Weight in the arms vs on the roller bolts react differently as you'll find...

I've tried a lot of different exhaust bolts, stainless, header, hi-grade, flanged, this and that etc. The best I have found is the stock Torx bolts that come with the machine and using Nickel anti-seize on them. Not sure why others would recommend going away from them if you don't have to. If...

I think the one my friend bought was made overseas, don't recall it being made by CVTech. I recall it being cheap and he wanted to give it a whirl. Not sure of the brand that is was, just that he purchased it on EBay. I had never heard of the brand of it.

To make use of larger diameter secondaries, you need to utilize a wider and longer belt to get more overall ratio usage top and bottom along with not limiting belt travel and pulling belt in half. Takes lots of trial and error to get the right belts. I did lots of testing back in the day on my...

These the cheap belts sold on EBay? I'm not sure about the brand, but I had a buddy try one off EBay he thought would be OK and it went boom on him the first day he used it on a stock winder. He's not what I'd call an aggressive rider anymore at all either, he can get 5000 miles out of the 8JP...

Good grief. Throw those dyno results in the garbage where it belongs. It’s quite obvious that the lower baseline run is slipping the belt so friggin bad it should’ve melted the clutch faces. For someone to post that and expect us to believe there’s a 90 horse track HP gain just switching...

HaHa, Same! I bought a 2011 Apex EPS sled and sent it down the road with just less than 400 miles on it. I didn't like that tank and neither did anyone in my family after riding the lightweight and fun Doo 1200's. In fact went back to a older 09 Doo 1200, but did the same with a 2012 Cat turbo...

Same. Yamaha simply had nothing for me till the 998 turbo and the handling and ride fixes Cat came with on the ProCross chassis. Still IMO the best on the market to this day if you want a four-stroke. I kept going back to the 1200 Doo till I saw how great the 17 was in LE guise with the QS3R's...

Pulled from Country Cats Facebook page. If their renderings are accurate, seems like the 998 lives on! Also looks like you can get EPS on the two-stroke 858 EXT Special for 2026, pretty cool! And thats the best looking Thunder Cat I've ever seen I might add.

I suppose the chassis could be loosing out on 7% efficiency some where, plus the fact they are not making the power claimed, which most know to be true. Think about where the power loss could be coming from however. There's only two shafts and a chain case. Typical power loss due to the...

Check the fuel pump plugs. Happened to me in a field where it just quit one day riding alone in the middle of no where. The next day while it ran fine, went into a pit stop, shut it off and It would not start at all. I knew It had no fuel pressure or fuel pump, suspected it was a relay, warmed...

Tim is talking about the 50% part throttle where the boost is up around that 23 lbs and hitting the boost cut. In some instances it will hit the boost cut. Typically when using big/more intercooler and its colder out the can do this. Again, parts and changes outside the parameters of what the...

Correct. The idea is to lift the studs out of the ice before needing to roll around the rear wheels. It's worth quite a bit for speed and of course the OEM's found this out with their tipped up rails with the track lugs too. It robs a lot of power to roll on wheels and also pull studs or a track...

You have to remember that 998 guys are a greedy bunch, and they are running hardware beyond what the tune was developed on. I dont care what brand tune a guy runs, when you put on bigger mufflers, ram air intakes, bigger intercoolers and other hardware that the tune wasn't developed for, they...

When drag racing and speed running, we'd take all the wheels completely off, even moved the back wheels upwards on the rails to ride strictly on the hyfax which proved to be faster than running on any wheels. This of course proved the Hyfax wasn't hot and sticking slowing things down. We used to...