Join Date: Jan 2011
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144" ZRT 600 clutching & performance mods
Alright, I've completed and become comfortable with my 144" long track project that I recently completed on my ZRT. Now it's time to add some performance!
First for a little background; the sled is a 2000 ZRT 600 with a tick over 2,000 original miles. Compression is 115 accross the board so I should be good to go. Carbs, air box and so forth have all been aprart cleaned and reinstalled a few weeks ago. No engine work or mods have been done and I'm running stock pipes with a MBRP race can. The running gear of the sled has been has been changed to a 144" x 2" notch track, tunnel extention, 136 Rails w/ 144 extension, extended heat exchangers with rear cooler, 8 Tooth Drivers, AntiStab Kit, new seat cover, 3" bar riser w/ hand gaurds, Slydog Powderhound Skies. I'm not a lake runner and my goal with this thing is to build a bit a of tripple tripple crossover. So far I'm pleased with my results. I don't care to go 120 accross the lake but love the 0-80mph stuff with the occasional powder run or hill climb.
After a few tries tuning the suspension I have come to a happy medium and feel that the sled rides and handles really well and hooks hard with the new track! I figure nows the time to go after a liitle more power. I've explored ideas of adding pipes, power breathers or gutting the air box, clutch kits, reeds, and of course gearing. I just don't know quite where to start or how far I want to go. First and formost it has to remain dead reliable! I also know that adding pipes affects everything else from jetting to clutching so if that's truely the best bang for the buck performance wise then pelase tell me so I'm not chasing my tail.
I guess I should start with the Air Box. Is it worth adding a power breather, should the air box simply be gutted or is it best to leave it alone. I've read countless forums that have only confused the matter.
Gearing? Rght now with the 8 tooth drivers I've essentially already geared it down and by the seat of my pants it pulls really hard from 20mph to about 80 on the speedo. I have little need to go much faster than 80+. I'd rather it be an animal from 0-80 as I don't do any lake running.
Clutching? Right now I dont know what size wieghts or degree helix I have although since both springs are yellow which I assume is factory I would assume the same for the rest. The only thing I noticed that's probably different from factory is the secondary spring is set in the tightest hole. I feel this might be pretty tough and I'll probably have to compramise a bit. I'd like it to come on pretty soft at engagement so I can get started in deeper bottemless snow yet once engaged pull hard and shift fairly quick. Maybe my thinking is backwords, feel free to add other suggestions. I know little to nothing about clutching.
Reeds? from what I've read there's really no downside to adding aftermarkets, let me know if I'm worng. The question comes down to Boyseen or Vforce and if used ones are safe or if new are a must.
Last but not least are pipes. I know they'll add performance with out a doubt. I also know that for the most part they make power at 88-9200 rpm depending on brand (and this will play into to clutching & gearing). What effect are these truley going to have and how much reliability am I going to sacrafice? Of course the next questions is if these are a must have what brand are the ones to watch for and which ones should a guys stay away from.
Thanks for any help, I'm looking forward to having a one of a kind relic. So far from the guys I know and ride with, all have been impressed with how this project has turned out. Just hoping to make it better. I'm also out of garage projects so I need something to wrench on in my spare time.