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Discussion Starter #1
the TRA is still a bit of a mystery to me, but i'm getting there. i was wondering if anyone has tried or uses the CF1 ramp in a mxz 700 compared to the widely recomended 287?  
 

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The Skidoo race book does and this is what they did(grass drag)cf1,260/420 spring,21 grams pins,50degrees helix with 21 lbs pull off

ROTAX POWER ALL THE WAY
 

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Discussion Starter #3
yea,i know, i read that in the manual too, i was wondering if anyone has tried it to see how it works? thanks for the reply though.i was just trying to figure out if the ramps were worth buying.
 

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Last night we set up a 2001 Summit 700, we used PX ramps, 21 grams of pin weight(in stock arms) with a Pink-Pink spring.  Cannot remember what helix we used(i know it was about a 50-46), we installed a white sec. spring at 18 pounds.   Using a 067 ski-doo belt also made a noticeable difference.
 

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not sure about his set up (uses his sled for drags as well as trail riding so I am not sure he would disclose all the details).  I do know he is running stock gearing, "heavy" pins, and stiff springs (he engages around 4800 for trails and around 5200 for drags).  sorry but that is the best I can do for you.  again, he swears these ramps are the cat's meow (has beat 800's and run 114mph on radar with a 1.25" track)
 

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This is what I would do,but first I will tell that I have the px,cf1,280,145,I have an improved 99 670HO that I run on the ice,I use the 145 alot because the profile is close to the 287 but better engagement and a little steeper for more shift rpm,the 280 and px are very similar but I find with testing that the 280 falls off in the middle where the px is better in the middle.the cf1 works great too but for the price I would try those other  ramps first because the difference isn't alot but the difference in your pocket book will be more.

You can make anyone of these ramps work in your sled with the right testing,pin weight and helix's will improve your performance too.

I have friends that run 700's and they are all working with  these ramps.

ROTAX POWER ALL THE WAY
 

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Discussion Starter #10
well , i have both sets of ramps now, so i will have to try each set out and see what my sled likes. my primary spring, pins, and arms are stock and my secondary has a 50/47 with a beige. i found a dealer where i live who had a set of cf1's on the shelf for a while and sold them to me for 12 bucks each, so that was worth it to me.
 
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