http://www.snowmobileforum.com
Go Back   Snowmobile Forum: Your #1 Snowmobile Forum


» Sponsors





Snowmobile Forum:  Your #1 Snowmobile Forum

Snowmobile Forum: Your #1 Snowmobile Forum (http://www.snowmobileforum.com/)
-   Arctic Cat Snowmobiles (http://www.snowmobileforum.com/arctic-cat-snowmobiles/)
-   -   F7 won't go over 100 (http://www.snowmobileforum.com/arctic-cat-snowmobiles/33845-f7-wont-go-over-100-a.html)

goreallydeep 01-21-2009 03:11 PM

F7 won't go over 100
 
I got my sled back from the shop after they fixed and adjusted my clutch and now it is alot snappyer but just like before i go it fixed, i can't get into thriple digits. i was on the lake last weekend on about 4-5inch of hardpack snow and i toped out at around 95. My sled gets there like instantly and it dosn't bog or anything, it just gets to around 90 and then crawls up. Wtf is wrong with it if it aint the clutch? i should be around 105 Help!:dunno:

RJ Gleason 01-22-2009 05:14 AM

What is the peak rpm at the time?
If you are over 8400, you are missing some of the set up.

IndianRvrShiver 01-22-2009 11:08 AM

SP track? Studs? All that adds up to more rotational inertia....prolly won't see triple digits!

goreallydeep 01-22-2009 08:46 PM

I top out at about 7800 rpms

DnD800 01-22-2009 09:44 PM

Quote:

Originally Posted by goreallydeep (Post 258946)
I top out at about 7800 rpms

Your rpms are way to low. Sounds like an issue with the power valves. Even on looser condition you should pull 105-109 with a 1" track.

RJ Gleason 01-22-2009 11:59 PM

The secondary needs to be set up right too.
If the spring is too weak for the primary clutch set up, you will not make the peak rpms needed for max hp.
You can move the spring one hole forward in the plate and that will raise the rpm at peak by 2-300 rpm and will make for better back shift too.

kccats 01-23-2009 06:32 AM

Yep more tenssion on the driven will give more RPM! But alot has to be acounted for to hit 100! Are all the bearings good? Is the track just tight enough or too tight? All the way to how good are your carbides? Then conditions have to be right too! Glare ice at Zero out with a light breeze at your back will give you a big advantage!

DnD800 01-23-2009 07:38 AM

Quote:

Originally Posted by D&D800 (Post 258965)
Your rpms are way to low. Sounds like an issue with the power valves. Even on looser condition you should pull 105-109 with a 1" track.


Disregaurd the rpms comment (had a brain cramp last night). Peak rpms are 7850 on the F7's which also means nothing wrong with your power valves.

goreallydeep 01-24-2009 12:25 AM

haha ya, and its got the 1.375 with studs so... lol i still should see triple digits tho?

[IMG]http://s198.photobucket.com/albums/a...Picture353.jpg[/IMG]

DnD800 01-24-2009 09:11 AM

Quote:

Originally Posted by goreallydeep (Post 259404)
haha ya, and its got the 1.375 with studs so... lol i still should see triple digits tho?

[IMG]http://s198.photobucket.com/albums/a...Picture353.jpg[/IMG]

I would assume that with that track 105 is about all it will go in prime conditions. If you want a lake racer you'll want a 1" track or less. The other thing you can do is check your shift out. You might need to gear down with that track. Take a black marker and put some vertical lines on your primary clutch. You should have nothing left or roughly 1/8". There is also some tricks to altering your helix/secondary to get a little more shift out as well. If I get a chance I will try to find the link that explains the secondary clutch trick (assuming you have a 03-04 F7 with a roller secondary).

goreallydeep 01-24-2009 10:08 PM

no i got an 2005 with the dimond drive and that good stuff

http://i198.photobucket.com/albums/a...cture353-1.jpg

IndianRvrShiver 01-26-2009 08:44 AM

Maybe it's that loud aftermarket can you have....they are known to rob HP!!

RJ Gleason 01-26-2009 09:31 AM

I know, it needs more stickers on it, you know that the right ones actually add up to 10 hp.

SHOStpr 01-26-2009 10:03 AM

Is it EFI or Carb?

goreallydeep 01-26-2009 02:27 PM

It's EFI with no mods under the hood, i want a can but the fine costs as much as the can does haha one day tho

buzsaw24 02-02-2009 12:29 PM

actually my uncle put his sled on a dyno and got about half a horsepower out of the can..... And my dad has the identical sled like yours and it will oply do about 95 too and my 03 does 110

goreallydeep 02-02-2009 07:17 PM

y tho??

kccats 02-03-2009 07:43 AM

The 03 Is the fastest F7! The diamond drive is slower and I dont understand why either! Maybe it's just gearing????

IndianRvrShiver 02-03-2009 11:40 AM

Quote:

Originally Posted by goreallydeep (Post 259404)
haha ya, and its got the 1.375 with studs so... lol i still should see triple digits tho?]

You answered your own question....you want top speed, get a 1" track w/o studs!!

Cdndairyman 02-03-2009 12:01 PM

+1 I put a 1.25" ripsaw on my 700 MXZ and lost a good 10km/h top end from the stock track. Its not studded either. I could only imagine what another 0.125" and studs would do. If you can get to 100mph you shoudl be plenty happy! Hell getting there is all the fun anyways and you should do that real quick now!


All times are GMT -5. The time now is 04:23 PM.


Copyright SnowmobileForum.com

Powered by vBadvanced CMPS v3.2.2

All times are GMT -5. The time now is 04:23 PM.



Copyright SnowmobileForum.com

Search Engine Friendly URLs by vBSEO 3.6.0