I ran that sled down to 89 in one cylinder and 90 in the other before i rebuilt it. That said after the rebuild with rk tech head they were pushing 165 in both. The only time that sled was not a first pull sled was when you drove it up on the trailer warm and drove down a bouncy road for 15 miles the combination of it getting bounced down the road and it seeing to cool down at the same time caused it to be the most stubborn sled to start ive ever seen barely able to get it to go with either! The conclusion that i was only able to come to is that it saw to cause of it to vapor lock in the fuel pump diaphram some how some way! The only other thing that i can see to warn about those sleds is if you ever find of yourself putting it under significant load when the ambient temp is a dank and warm 42+ degrees F out like breaking trail for like 5 min straight. To ones suprize when you let off the throttle it may indeed remained pinned due to them having seen to freezing solid no matter what you see to do! Warm water freezes faster than cold water so i can only assume the same proves true with fuel upon the flat slides of the 40TM carbs. In 2002 they added a circut of coolant that ran thru the carbs to prevent of it. It can see to be a real wake up call upon reaching the end of the snowed over road! The carbs are similar enough to get a pair of the 2002's and just swap over all your jets as the factory settings seemed to me to be far different as i believe 2002 they went to The H.O. by port raising of the exauhst ports freeing up about 20 h.p. in stock N.A. form. Good things to know. I still have that sled stock it weighed 499lbs it presently sits @ 389lbs When i get on any other zx I am quickly reminded as to what complete tanks they really were in stock trim. It is still a first pull sled that i rebuilt with the intentions of turboing it but it runs so darn good N.A. i just have not been able to force of myself to do it to it! Beside they come that way from the factory now if i want it turboed i can pretty much by one that way!

Sell those sleds in the UP of Michigan and they will be rebuilt and ripped around for another 10 years. 906💪

Holy God! Paper Weights? What do you want for them? Apparently, I love Paper Weights.

I have an 02 mxz 600 and it’s got over 10,000 on it and it still runs good.takes 5-8 pulls almost every time but my reeds and carb boots are beat up.but I plan on doing a rebuild this spring if she makes it this season

Cringed when you hammered out the wrist pin....Dead blow or not, that is asking for trouble as you damage the big end bearing. piece of pvc pipe and a threaded rod is the way to pull it out.

I have been struggling to keep up with and complete all my projects. I just need to learn to make cherry pies.

8:07 - I think moto moto likes you 🦛

Wish you gerry and Mindy were my neighbors

Start to finish, without a trip or order parts. What kind of labor in time did it take? I have an ‘01 Summit 600 that’s a monster to start.

Could you post your parts list, pistons, bearings, seals, etc, and price of each? Nice video, I have a 2003 summit 800, that has similar problem.

What scored the piston in the first place? something caused a lean condition on the intake side, if you don't solve that problem, it is very likely it will do it again in the near future. It could be sucking air from cracked carb boots or reeds, it could have bad gas in it, plugged jet, bad crank seal on that side or both sides. Oil injection system may not be working properly. I would be willing to bet its the 22 year old crank seals.

How about the carb boots?

I hate single ringers