How Can I Help My 98' Mxz 670 Grow Some Balls? [Archive] - Snowmobile World : Your #1 Snowmobile Forum

: How Can I Help My 98' Mxz 670 Grow Some Balls?


louigi
11-24-2003, 09:47 PM
i've already been told to re-clutch it with a new goodwin but im lookin for somethin wit a small price tag that will really light a fire under its ###! any suggestions?

Rocketman
11-24-2003, 09:49 PM
build it out to 670HO specs :D

DooZ
11-27-2003, 08:44 PM
501 rotor, short boots, 286 ski doo ramps in the clutch, Y pipe cut, All this can be done for $100.00 to $125.00 (U.S.) She'll have great mid range, and a little more top end, and the bottom won't suffer. I have this set up on my 98 FZ.

Go to Don Emory's "DNE" site the above is out of his recipe book for 670's!

DooZ :slick:

cwarner
11-27-2003, 08:51 PM
what is the address for Don Emerys web site?

The Student
11-27-2003, 09:11 PM
I'm pretty sure it is www.dneperformance.com.

DooZ
11-27-2003, 09:19 PM
You know it's been a couple years now when we did this mild mod, and I wanted to make sure its right....... I was close but not close enough........here is better info......

Best thing to do is go to don emery's site its www.DNEperformance.com (all one word on the dne performance. )

He gives you all the spec.s right there and a template on how to cut the Y pipe.

He gives you a new jetting spec which we didn't have at the time, and he also gives you the timing spec on the 501 rotor which is 146 degree-76degree.

I didn't have the clutch spec right (sorry! it was to long ago to remember exact, here is the correct info.) stock ramps are 286 change to 280's go to a yellow erlandson 240-320 spring. adjust your clickers to give you a max RPM of 7900-8000. secondary clutch spring set at C-6 or B-1 (16lbs.). Air box modifications are not recommended.
Sorry for the incorrect info. above....that's what I get for trying to remember!!
Thanks DooZ :slick: