building a fast KX85

r-acer · 12-27-2005

Hey guys, I did a search on the forum but didnt find too much. I am in the process of building my son a fast 2001 KX85 race bike. After doing some research on the internet, this is what I came up with.......let me know how it looks. Im going to order these parts later this week.

2001 Kawasaki KX85

-107cc ported Big Bore kit (lukes racing)
-Vforce reeds
-Pro Circuit Pipe
-Pro circuit silencer
-Twin air filter
-EBC Clutch
-Excel Rims (Black)
-Wave Rotor Front
-13T Front & 51T Rear Renthal sprockets
-Michelin Race tires
-Renthal bars
-Graphic kit with Gripper seat cover

What do you think? This stuff in not cheap!! want to make sure its a good combo.

r-acer · 12-28-2005

common guys......no one knows anything about the KX85?

NinjaGirl · 12-28-2005

Be paitent oh one!

sx455 · 01-03-2006

That all sounds great. We prefer the FMF stuff, but thats us. Better check the rules of where u want to race , make sure 107cc is legal.

r-acer · 01-05-2006

I was told by 2 engine builders that the Pro Circuit makes more HP, this is also what the Kawasaki Factory team uses. Has anyone used the Vortex X10 Ignition system on this bike? is there a significant difference? ThanX

KBracing · 01-09-2006

That's a lot of money to put into a 2001 bike.

What class is he going to race?

Get a KTM 105.

sx455 · 01-11-2006

PC makes alot of hp, but the "peak" hp is generally way up in the rpms.
We have tried the PC, the pipe makes power, no doubt. If you are looking for just "peak" hp, thats your pipe.
The the FMF SST pipe ,although it doesnt make the big up top power gain of the PC , has a gain all the way across the power band. It is much more forgiving . For most kids , this transfers into faster lap times.
I have also found getting the suspension setup correctly does more to make you a "fast" bike ,or should i say "faster on your bike", than any power enhancing product. This is of course if you are relating "fast" to mx track fast, or "drag race" fast?
I have seen many kids show up at the races on totally "bad-arszz" bikes,just to chase kids on "stockers" , just because they didnt have a useable power band or suspension setup for their skill level. Food for thought ??

r-acer · 01-11-2006

you are right about the right about the suspention set up.....working on that next. I picked up an FMF fatty pipe in mint condition as well off ebay for like $60. So I will have both to compare.
Stock for stock the ktm is probably faster BECAUSE it comes with the race parts from the factory, but once they are all modded they are pretty equal........ Its more about Rider skill than the bike itself.
I am also considering a Vortex ignition system....... is it worth the $350 price tag?
I know its mostly rider that will do it, BUT I want to give him the best tools to work with.

sx455 · 01-11-2006

The fatty is more of a low end pipe, the "woods" guys and the "arenacross" guys love it.
I wouldnt hesitate saying the KTM is faster stock, until 06 that is, I dont know if we just got lucky and ended up with 2 "bullets" or what. But the 06's we have were nite and day faster than the 05 and 04 they replaced? Maybe we got 2 team green prepped bikes by accident!! LOL

sx455 · 01-11-2006

I cant have an opinion on the ignition, weve never used it.
I have 4 boys racing, they get bikes, reeds,pipes and do the best they can !!

r-acer · 01-11-2006

Kool, well the local class that we are running is more based on age, and will let your run what you bring, so im hoping the ported 107cc Big Bore will give my 11 year old an advantage as far as the bike goes, the rest is up to him. he will be up against some heavily modded bikes...ktm's, YZ's, etc.....
The bike needd a new top end, andit wasnt much more to just have it bored, so I wne tfor it.

sx455 · 01-11-2006

The Lukes stuf seems to reasonably priced , I havent seen any first hand , but the pictures look good on the website. I have talked to them several times, guy seems to be pretty up and up with the kx's and cr's. Good Luck

jerrysmalley · 01-15-2006

I looked at lukes racing and did not find a big bore kit. Where did you buy it?

r-acer · 02-02-2006

Well I got the big bore kit back from Lukes Racing and the workmanship looks good. I sent a 2001 old looking cylinder and I got back a brand new looking cylinder, head, new bolts, studs, ported big bore with new piston, and all the accesories needed to put it together. Also picked up a bored out stock carb off ebay. hope this makes the big power im hoping it will alond with the Vforce and PC Pipe/silencer.

r-acer · 02-21-2006

Got the bike back together last night and man does this thing bark!!! It sounds and reve's up like you wouldnt believe. Cant wait till the snow goes away.

Kawasaki Dude · 04-04-2006

do you have any pic's?

IKU · 04-04-2006

Quote:

Originally Posted by Kawasaki Dude

do you have any pic's?

i agree, i also wants pics

12-27-2005	#1 (permalink)
r-acer Newbie Join Date: Dec 2005 Posts: 7	building a fast KX85 Hey guys, I did a search on the forum but didnt find too much. I am in the process of building my son a fast 2001 KX85 race bike. After doing some research on the internet, this is what I came up with.......let me know how it looks. Im going to order these parts later this week. 2001 Kawasaki KX85 -107cc ported Big Bore kit (lukes racing) -Vforce reeds -Pro Circuit Pipe -Pro circuit silencer -Twin air filter -EBC Clutch -Excel Rims (Black) -Wave Rotor Front -13T Front & 51T Rear Renthal sprockets -Michelin Race tires -Renthal bars -Graphic kit with Gripper seat cover What do you think? This stuff in not cheap!! want to make sure its a good combo.

12-28-2005	#2 (permalink)
r-acer Newbie Join Date: Dec 2005 Posts: 7	common guys......no one knows anything about the KX85? Last edited by r-acer : 12-29-2005 at 05:46 AM.

01-09-2006	#6 (permalink)
KBracing Foil Inspector BTK Beginner Join Date: Feb 2004 Location: Delta, Ohio Posts: 107	That's a lot of money to put into a 2001 bike. What class is he going to race? Get a KTM 105. __________________ Andrew #202 7-11 85cc advanced Kyle #041 7-11 85cc intermediate Frank #5 vets

04-04-2006	#16 (permalink)
Kawasaki Dude Your not a Beast!!! Join Date: Mar 2006 Posts: 24	do you have any pic's? __________________ http://usera.imagecave.com/95civic/p.../KX857.bmp.jpg

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12-28-2005	#3 (permalink)
NinjaGirl 2007 RED HOT Ninja 650R! Forum Supporter Join Date: Apr 2004 Location: Arizona Posts: 3,122	Be paitent oh one!

01-03-2006	#4 (permalink)
sx455 Still On The Kickstand Join Date: Oct 2004 Location: central virginia Posts: 25	That all sounds great. We prefer the FMF stuff, but thats us. Better check the rules of where u want to race , make sure 107cc is legal.

01-05-2006	#5 (permalink)
r-acer Newbie Join Date: Dec 2005 Posts: 7	I was told by 2 engine builders that the Pro Circuit makes more HP, this is also what the Kawasaki Factory team uses. Has anyone used the Vortex X10 Ignition system on this bike? is there a significant difference? ThanX

01-11-2006	#7 (permalink)
sx455 Still On The Kickstand Join Date: Oct 2004 Location: central virginia Posts: 25	PC makes alot of hp, but the "peak" hp is generally way up in the rpms. We have tried the PC, the pipe makes power, no doubt. If you are looking for just "peak" hp, thats your pipe. The the FMF SST pipe ,although it doesnt make the big up top power gain of the PC , has a gain all the way across the power band. It is much more forgiving . For most kids , this transfers into faster lap times. I have also found getting the suspension setup correctly does more to make you a "fast" bike ,or should i say "faster on your bike", than any power enhancing product. This is of course if you are relating "fast" to mx track fast, or "drag race" fast? I have seen many kids show up at the races on totally "bad-arszz" bikes,just to chase kids on "stockers" , just because they didnt have a useable power band or suspension setup for their skill level. Food for thought ??

01-11-2006	#8 (permalink)
r-acer Newbie Join Date: Dec 2005 Posts: 7	you are right about the right about the suspention set up.....working on that next. I picked up an FMF fatty pipe in mint condition as well off ebay for like $60. So I will have both to compare. Stock for stock the ktm is probably faster BECAUSE it comes with the race parts from the factory, but once they are all modded they are pretty equal........ Its more about Rider skill than the bike itself. I am also considering a Vortex ignition system....... is it worth the $350 price tag? I know its mostly rider that will do it, BUT I want to give him the best tools to work with.

01-11-2006	#9 (permalink)
sx455 Still On The Kickstand Join Date: Oct 2004 Location: central virginia Posts: 25	The fatty is more of a low end pipe, the "woods" guys and the "arenacross" guys love it. I wouldnt hesitate saying the KTM is faster stock, until 06 that is, I dont know if we just got lucky and ended up with 2 "bullets" or what. But the 06's we have were nite and day faster than the 05 and 04 they replaced? Maybe we got 2 team green prepped bikes by accident!! LOL

01-11-2006	#10 (permalink)
sx455 Still On The Kickstand Join Date: Oct 2004 Location: central virginia Posts: 25	I cant have an opinion on the ignition, weve never used it. I have 4 boys racing, they get bikes, reeds,pipes and do the best they can !!

01-11-2006	#11 (permalink)
r-acer Newbie Join Date: Dec 2005 Posts: 7	Kool, well the local class that we are running is more based on age, and will let your run what you bring, so im hoping the ported 107cc Big Bore will give my 11 year old an advantage as far as the bike goes, the rest is up to him. he will be up against some heavily modded bikes...ktm's, YZ's, etc..... The bike needd a new top end, andit wasnt much more to just have it bored, so I wne tfor it.

01-11-2006	#12 (permalink)
sx455 Still On The Kickstand Join Date: Oct 2004 Location: central virginia Posts: 25	The Lukes stuf seems to reasonably priced , I havent seen any first hand , but the pictures look good on the website. I have talked to them several times, guy seems to be pretty up and up with the kx's and cr's. Good Luck

01-15-2006	#13 (permalink)
jerrysmalley Newbie Join Date: Jan 2006 Posts: 1	I looked at lukes racing and did not find a big bore kit. Where did you buy it?

02-02-2006	#14 (permalink)
r-acer Newbie Join Date: Dec 2005 Posts: 7	Well I got the big bore kit back from Lukes Racing and the workmanship looks good. I sent a 2001 old looking cylinder and I got back a brand new looking cylinder, head, new bolts, studs, ported big bore with new piston, and all the accesories needed to put it together. Also picked up a bored out stock carb off ebay. hope this makes the big power im hoping it will alond with the Vforce and PC Pipe/silencer.

02-21-2006	#15 (permalink)
r-acer Newbie Join Date: Dec 2005 Posts: 7	Got the bike back together last night and man does this thing bark!!! It sounds and reve's up like you wouldnt believe. Cant wait till the snow goes away.

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