Planet Minis

JAGSpeed@XMR

Ok. I just started the install of a CRF150R engine into my NSF100. The engines looked to be about the same size but the mounting points are all different. The CRF engine uses the swingarm pivot as its main mounting point and the NSR does not. I wanted to utilize this to keep the swingarm pivot and countershaft close. So I cut and reworked the stock arm and some minor work to the rear motor mount and it worked out great. I then made a removable engine cradle for easy access. The next step is mounting the radiators and making a custom exhaust.
I just hope I can keep the front wheel on the ground when it's done.

Attached Images

	NSF E.jpg (151.4 KB, 671 views)
	NSF eng l.jpg (120.2 KB, 664 views)
	NSF eng r.jpg (115.3 KB, 811 views)

BAJAZBR

cool idea,the new waterpumper 150 is gonna ripe.id like to put one in my 2004 nsr50.

RcWannabe

Very cool project, that bike is going to be a total animal.

223

where did you get juust the motor

jmurray192

Now thats is cool!

scorpio

Yeah, don't forget the 12 o'clock bar. hehe.
That thing is gonna be a beast!

rjpracing

nice bike
miniman on this site has a 150r engine in rs125 and thats a sick bike also!

JAGSpeed@XMR

I mounted the radiators, There was not that much room to fit them in. The radiator mount has only 1/2in clearance from the tire when the suspension is fully compressed and another 1/2in from the reworked pipe. The pipe had to be modified to fit in. I used the original head pipe, but had to cut it, grid it, and re-weld it in a couple of places to get it to fit with minimal clearance. The tail section of the pipe was not to difficult just welded 3 pieces together at the right angles and added a carbon canister. Since the pipe came around the left side on the NSF motor and the CRF exited on the right I had to relocate the shock reservoir to the left side of the bike as well as the rear brake reservoir.. My original plan was to mount the motor just forward of the swingarm pivot. I'm glad I utilized the CRF's rear mount and cut the arm to accommodate it or I never would have had the room for the radiators and exhaust.

Attached Images

	NSF pipe f.jpg (114.3 KB, 361 views)
	NSF pipe r.jpg (125.8 KB, 332 views)

dood

that's soooo kewlll

shw911

Nice work. You've got skills!

Nooblette

Let me know how This ends up working out. I have a 150cc Air cooled Lifan I am putting in my YSR. I am hoping to keep it streetable. We'll see

boonacka

damn, that thing is gonna fly! very cool project. definitely keep us updated!

where did you source the 150r motor?

shw911

it's a wheelie machine

xr70racer

Oh wow... THats all I got to say

miamiGP

congrats!!! you'll have the ultimate mini racer, bought my 150r thinking on put that engine on my nsr, but then I decided to keep both bikes and went with the 50 pro race to compite in F1, but I always wanted to do what you're doing, maybe when I get tired of the 150r.
good job!!!

JAGSpeed@XMR

I found the motor on this forum from Lasvegasstreetterror, He had everything that I needed to make this work. Can't wait to see what he is doing with his project he told me he was putting a 250 motor in the 150 chassis.

miamiGP

so now you have 4 needle bearings instead of 2 on your swing arm?

JAGSpeed@XMR

No, I still have just 2 needle bearings on the arm. There is a inner shaft that goes all the way through the arm and the motor. I left that in one piece to keep the strength. The bolt goes through the inner shaft and holds everything tight so the swingarm pivots on it's 2 bearings just as it did stock.

miamiGP

oh, I see. so the mounting hole of the engine was big enough to receive that shaft? (I think it's 20mm).

JAGSpeed@XMR

I had to bore out the mounting hole in the engine by 2mm to accept the shaft.