KTM chassis/Blaster engine - BUILD!!

Roostboy101

Roostboy101

New Member
Jan 9, 2010
34
1
0
Well I thought I'd come over here to where everyone loves the little blaster machines. I always thought they were neat lil wheelers but man they have some real potential and very reliable, low maintenance quads.

In case the title didn't do it for you - I'm putting a blaster motor in a KTM EXC chassis. For reasons like no power valve to clean, air cooled (no rads to smash), cheap to fix and find parts...

I got the rolling chassis for free. The brakes work but need some work. The rear wheel needs shimmed in different places to make it line up. But all in all I got a good chassis with a "mc" title which means that I can goto the notary and get registration for it! I:I

I had been pondering the idea for well over a year now and finally decided to do it. I just got a '98 blaster motor last weekend with all electicals and carb for $400. He did a compression test on it and said it was around 120. I kicked it over a few times and seems to have decent compression.

So here begins the build thread full of questions!! Here's a few shots I just took after the first mock up:

100_0755.jpg


I was really surprised how well the pipe/kicker/engine area worked out for fitment!

100_0754.jpg


100_0753.jpg


The carb is really happy where it's at BUT the TORS has got to go - it won't fit with the tors on because it hits the frame tube. Someone on TT told me about the motionpro twist throttle kit that eliminates the tors but you need to drill a hole for an idle kit? I'm sure someone has experience with them. Is it a quality product? Or is there a better option for totally eliminating the tors??

Thanks in advance for ANY input that you people may want to throw my way!
 
welcome bro, you've come to the right place, and yes the motion pro kit, or vito's performance tors kit will work and come with instructions that show ya how to drill and tap the idle screw kit
keep us posted on this interesting project!!!!!
 
its about time someone put a blaster motor in something else. i always see people building blasters with motor swaps but never the other way around. good luck with it man it looks like it shouldnt be too tough to do
 
Oh yes I will keep it updated! Other than the TORS the only other problem that I think I will have is finding a gas tank/seat combo that works on this frame. The factory tank doesn't work because of the big jug. I'm also kinda looking forward to the REbuild next year - when it'll get it's blingity bling shiny things and whatnot. But for now just wanna get it running and working and work out all the bugs. Then I can polish and add bling :D
 
What would a bigger carb come off of? Like a yz or something? I really know very little about two strokes. I've been on four strokes for 6 years now and before that I was too young to learn about the smokers.
 
Nice to see some pics! I'm tuned in :) I agree with specialized7 ditch the tiny stock carb and get a 30mm. I have serious doubts about that pipe, it might work but its never gonna run right.. I know guys who have used both 125 pipes and 250 pipes, the 125 pipe is way too small in volume and timing, and the 250 is way off on timing and header size for it to work right. Never know though! Thats a big problem with any 2stroke hybird.
 
Blasterdude27 said:
Nice to see some pics! I'm tuned in :) I agree with specialized7 ditch the tiny stock carb and get a 30mm. I have serious doubts about that pipe, it might work but its never gonna run right.. I know guys who have used both 125 pipes and 250 pipes, the 125 pipe is way too small in volume and timing, and the 250 is way off on timing and header size for it to work right. Never know though! Thats a big problem with any 2stroke hybird.
Click to expand...

Well the KTM was originally a 200 - so in my tiny brain I'm thinking same displacement - same amount of exhaust? Am I totally off on that thinking? I guess we will find out
 
Roostboy101 said:
Well the KTM was originally a 200 - so in my tiny brain I'm thinking same displacement - same amount of exhaust? Am I totally off on that thinking? I guess we will find out
Click to expand...
Sort of. Your thinking is in the right place, it has more to do with the size of the exhaust port, transfers ect. you really need a pipe thats built for the engine itself and not the cc of the engine. Did it come of the xc model? they have less aggressive porting and lower compression it may actually work ok, still not as good as something made specifically for the blaster but it still could be just fine. best thing to do is run it and see, thats really the only way to find out.
 
Yes it's an EXC and it's an FMF Gnarly (made for low end torque rather than screaming) Yea that will be a hit or miss once it's welded in and ready to go. Speaking of welding - it's ok to weld the motor mounts while the engine is in the frame? Won't damage any electrical parts? Or is it better to take it out. JW if anyone ever had probs with this! Wow I've learned alot already! Thanks guys
 
Oh yea the oko - are they junk? It's looking like I might as well just get another carb rather than doing the tors eliminator.
 
nice build... a 200 pipe may get you in the ball park but may need some cutting and welding here and there... may need to lenghten or shorten the stinger ( end of the pipe byfore the sielncer) but it might work just fine.. whoi knows
 
You must log in or register to reply here.

Similar threads

C
Yamaha blaster with honda cbr500r engine.
Replies
1
Views
481
Engine Mods and Swaps
reggiexp
R
mmmorphine
Looking for engine
Replies
0
Views
97
Wanted
mmmorphine
mmmorphine
Dragonslayer
Blaster idles, but revs up slowly in neutral and has no power in gear
Replies
1
Views
300
Engine
Dragonslayer
Dragonslayer
Blaster200_117
Fully built 240 stroker opinion??
Replies
1
Views
358
Engine
Yz2fiddyswapped
Yz2fiddyswapped
N
Engine operating temp
Replies
0
Views
269
General Support
NicV
N
Top Bottom
Back