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Discussion Starter · #1 ·
Well I have been racing X/C for 9 months on my KFX now and have learned a few things.
1. Switch to the Yuasa YTZ7S battery for better starting and more cranking amps.
2. The Dirtbike clutch works well. I run the EBC KX450f clutch in mine and it pulls better. (you do have to remove the 2 spring washers that are inside of the first friction plate) then replace the clutch as normal.
3. Lube everything alot the factory must have had a shortage of grease.
4. The brake pads are the same as the KFX700.
5. The stock carrier bearings are weak, I put on the Lonestar carrier with heavy duty bearings.
6 The Tusk clutch is junk.
7. The Tusk oil filter doesn't fit properly
8. The Tusk brake rotor is a inexpensive alternative to OEM and seams to work good so far.
9. grind 1/16" (no more) off the steering stem stops for sharper steering.
10. The bike handles so much better while seated after modding the subframe (lowering the rear}.

Sorry I can't add pictures to the central sites ( too much hassle). If you want to see them check Quadzone forums in Gt Thunder section.

So If anyone else has any tricks or tips to add post them up.....Happy Holidays guys....ric
 

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Was was yours cornering in slow tight situations stock and after your subframe mod? That's the only complaint I have about mine is that it pushes (usually into a tree) when doing a tight 1st gear turn. It could be in my shock setup also, but was just wondering if you could tell a difference in that area after you modded your sub.
 

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Discussion Starter · #3 ·
QUOTE (billdogg @ Dec 9 2007, 12:46 AM) index.php?act=findpost&pid=4764
Was was yours cornering in slow tight situations stock and after your subframe mod? That's the only complaint I have about mine is that it pushes (usually into a tree) when doing a tight 1st gear turn. It could be in my shock setup also, but was just wondering if you could tell a difference in that area after you modded your sub.

The subframe mod was to lower the seat height for when you were seated making it feel not tippy during off camber hills and to keep your center of gravity lower. My GT Thunder took care of any pushing tendacy and I found my tire pressures too low causing roll in tight corners. The KFX wants you to lean foreward into the turns since the front is so light and the swingarm is short. Being 6"3" i tend to ride sitting down alot more so the subframe mod was a definate help.....ric
 

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I'm planning on getting a GTT rebuild this winter, so I'm glad you had good results with it. What PSI do you run in the front? I think the last race I did was 4* in all tires.
 

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Discussion Starter · #5 ·
QUOTE (billdogg @ Dec 9 2007, 12:52 PM) index.php?act=findpost&pid=4773
I'm planning on getting a GTT rebuild this winter, so I'm glad you had good results with it. What PSI do you run in the front? I think the last race I did was 4* in all tires.
I normally run 4.5# in the front and 4# in the rear. mine got down to 2# with the temperature changes. I am trying 6# now just to see what I like the Kenda tires seem to roll more than my Irazr's did. I hope to ride next weekend and play with tire pressures. I may switch back to the Maxxis tires....ric
 

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You run in the IXCR right? I might see you out next year if you guys have a race at the badlands again. I'm going try out some of the local district 17 harescrambles this year and possibly a GNCC.
 

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Discussion Starter · #7 ·
QUOTE (billdogg @ Dec 9 2007, 04:38 PM) index.php?act=findpost&pid=4776
You run in the IXCR right? I might see you out next year if you guys have a race at the badlands again. I'm going try out some of the local district 17 harescrambles this year and possibly a GNCC.
Actually I help run the IXCR series. I will be there and we have 2 races at the Badlands planed. the schedule is on www.ixcr.com see you there...ric
 

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Thanks for the tips. Very helpful.

How about some details on that sub frame mod? We're setting the bike up for TT, so I think that would be right up our alley.
 

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Discussion Starter · #9 ·
QUOTE (fastrnrik @ Dec 12 2007, 10:24 AM) index.php?act=findpost&pid=4818
Thanks for the tips. Very helpful.

How about some details on that sub frame mod? We're setting the bike up for TT, so I think that would be right up our alley.
What I did for the subframe mod was to remove 5/16 of lower subframe therefore lowering the rear at the grab bar 2". I can e-mail the details if you need them. For flat track I would think the Jennsen racing lowering link would work good. I tried it but lost too much travel for racing X/C. ...Ric
 

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QUOTE (prey2none @ Dec 14 2007, 10:20 AM) index.php?act=findpost&pid=4846
What I did for the subframe mod was to remove 5/16 of lower subframe therefore lowering the rear at the grab bar 2". I can e-mail the details if you need them. For flat track I would think the Jennsen racing lowering link would work good. I tried it but lost too much travel for racing X/C. ...Ric
Sounds pretty simple. If you could email details that would be great.
my email is [email protected]
I've looked at the Jannsen link. It looks like a nice piece.
Thanks
 
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