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I am in the process of installing my Lightweight Rear Suspension Kit. I had it since beginning of last season, but I never installed it because I was less than impressed with the attachment between the front swingarm and the tunnel. According to the instructions in the kit, you are supposed...

I would not put studs in the MTX at all because there are no stud protectors on the front heat exchanger. Put studs in, brake hard and you will cut up this heat exchanger in no time...

Like HYFLYR says - pipe it and run it...! If there is any difference in exhaust flow and exhaust back pressure, it is negligible and it will for sure not affect your break-in. Just swapping out the OEM silencer does not require any changes to the fuel map, which also means you will not gain very...

You are not going to leave the rear bumper like that, are you...? No additional supports...? No strengthening plates inside the tunnel extension...?

The question remains - who says they are better...?

The chaincase design of FX Nytro is a completely different story compared to Apex and the older models. Some part numbers for sprockets and chains are for sure interchangeable, but shafts, bearings, bearing holders, covers and many other parts are different.

To my knowledge, not a single FX Nytro did blow an engine because of insufficient OEM oil filter capacity. However, there are couple of them that ended up in serious trouble because of interference problems caused by non-OEM filters... Also, there is not really any need to use bulky oil...

My old man once had a 2005 RS Vector with the silver paint job. The front shocks had red springs and they looked very much like the ones in your picture.

With all the boost kits currently available, big bore kits and stroker kits is a waste of money (unless you are building a race engine for a class that does not allow boost). Similar cost to getting boost and no more than 10% horsepower increase. Like getting boost and charging 0.1 bar...

I know what you are talking about. With the exception of OFT and a very few other high quality snowmobile specific companies, I feel exactly the same way. I am into streetbikes and motorcycle race bikes as well and I would put it this way - if some of the lower quality snowmobile specific...

http://en.wikipedia.org/wiki/Ester Esters are chemical compounds consisting of a carbonyl adjacent to an ether linkage. They are derived by reacting an oxoacid with a hydroxyl compound such as an alcohol or phenol.[1] Esters are usually derived from an inorganic acid or organic acid in which...

www.heatshieldproducts.com

The best high performance oils for motorcycle engines all contain esters.

The velcro that comes with any Dynojet product is a joke. Get yourself some proper 3M Dual Lock instead. Certified for industrial use in high-vibration environments, can be opened and reclosed over and over again and the adhesive backing is much stronger than the joke from Dynojet.

Each Yamaha chassis rivet is two grams after mounting. You are not saving a lot of weight by leaving the holes empty...

Laid out the new Challenger Extreme track next to the sled. The Maverick looks kind of ridiculous in comparison...

Is that the same package as last year, with the 128" track and relocated skid...? In which classes are you allowed to use it...? I was under the impression the boys from Valcourt managed to get it banned in cross country racing...?

This thread sucks even with pictures...

My best guess would be the typical Polaris thing - use the customer as test pilot... After all, not that many people are involved in chassis design at Polaris and the few that are can't really be requested to know a lot about Formula 1 / aerospace bonding techniques. Because of this they are...

In my opinion, the big advantage of glued together chassis components is the fact that you can use a completely different design strategy behind many details. This is where the big weight savings can be found. Not in the lack of rivets, as one Yamaha chassis rivet is just little bit more than...