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Old 02-04-2011, 01:42 PM   #1
sailah OP
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Motor suggestions for a roller aside from the stock YZ450f?

I'm looking for a motor for a YZ450F roller I picked up for cheap. I priced out a new YZ motor $$$$ and even am thinking of going 2T in the chassis.

I know its bigger and heavier, but this is strictly a trail bike ridden by a fat duffer with no skillz. I don't mind the weight and I can deal with the shoehorning but is this going to be a nightmare sizewise? Anyone have one of these they can measure vs a YZ450F? Much obliged if ya can.

I'm a sucker for a project and have read a thread or two about transplants but this seems uncharted territory.

I have a hydraulic tubing bender and TIG welder so I can pretty much redo the frame.

I like the raptor motor because its got some nut, pretty reliable as far as I can tell, cheap, good service intervals etc.

Any other suggestions? I want to keep the motor to around $500 so that rules out a stocker along with a host of others. The DRZ mill appeals to me on a lot of the points, but who doesn't want a 660 vs 400??

Here's a pic of the roller:


sailah screwed with this post 02-06-2011 at 03:17 AM
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Old 02-04-2011, 03:32 PM   #2
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sending you a pm with some info.
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Old 02-04-2011, 11:08 PM   #3
Adrian V
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Raptor into a 640 ADV?

Switchblade 315. I would also be interested in knowing more about the Raptor engine, as a possible transplant into a 640 Adventure. Care to share the info?

Cheers,

Adrian
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Old 02-04-2011, 11:21 PM   #4
drarin
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oil is inside the frame on those right?
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Old 02-05-2011, 05:28 AM   #5
sailah OP
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i think it has a sep tank but not 100%
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Old 02-05-2011, 06:58 PM   #6
Switchblade315
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ok guys the raptor motor is a monster. here's the pictures I took. Also it has a oil tank. it holds around 2 1/2 quarts of oil over all. I have given up on puting that thing in a bike. having a place for the carbs is the real problem. you might could use a 660 grizzly carb. same topend but it uses one carb insted of two.



this is from front to back



side to side



and the carbs are this big



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Old 02-05-2011, 07:12 PM   #7
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Put a banshee motor in it
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Old 02-05-2011, 07:28 PM   #8
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you can't keep a banshee together long enough at a constant high speed. they tend to go lean and cook themselves.
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Old 02-06-2011, 03:16 AM   #9
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Any other ideas? Thinking of a KTM 300 mill
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Old 02-06-2011, 04:10 AM   #10
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I have never built a bike in this fashion, so take what I have to say with a grain of salt... but, I think you should find a motorcycle specific motor not a quad motor. A quad designed motor has bigger tranny gears for the extra load, most even have reverse. They have much more room in their chassis.

Try to find a 600ish bike motor... xr650, xl650, older xr500, dr650, dr600, xt600...

Someone already did a similar project using a yamaha xt660, I'll see if I can find the link
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Old 02-06-2011, 07:27 AM   #11
Switchblade315
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Actully most of the newer race quads have modded dirtbike motors on them now. you have to get bigger then a 450 in a quad to get into the true quad motors. with that said. you are right about most of them have different gearing. it's a little lower and tighter.

I have took a Tri-Z 250 and mated it with a Warrior that worked out nicely. you should be able to fit any 2-stroke in that frame. and for tht matter any 450 4-stroke. the bigger KTM motors should also fit... but i'm guessing here.
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Old 02-06-2011, 07:43 AM   #12
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The 660 Raptor engine began life as a Euro spec bike engine. Changes to the trans to adapt into the quad. Bigger gears, different ratios, and reverse.

Probably the wrong project to try and adapt it into that 450 frame. It's just physically big and made for a larger bike.

I built a good sand quad out of a Raptor. Put a 12-1 piston in it, good cam, ported head, yadda yadda. Fucker is a real beast! Runs away from my YFZ450's and those run good.

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Old 02-07-2011, 01:52 PM   #13
yondering
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Quote:
Originally Posted by Switchblade315 View Post
... you are right about most of them have different gearing. it's a little lower and tighter...
Not necessarily tighter gearing on the quads. Take the DRZ400 and LTZ400 for example. Same basic motor, but different transmission. The quad has a wider gear spread. Too bad the quad gears won't work in the bike motor, it would be better for DS use.

On the 660, didn't the MZ Baghira use the Raptor 660 motor?
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Old 02-07-2011, 02:13 PM   #14
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As far as reliability, 650 raptors have some starter issues. The bolts break on the one way clutch and tear things up. The rollers in the one way clutch also wear quite a bit. As has beeen stated I thin kit would be difficult to shoehorn into a yz450 frame. If you are loookinf to trail ride only i'd suggest finding an inexpensive YZ or Wr400/426 and tranplant in to your later model chassis.
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Old 02-07-2011, 06:13 PM   #15
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Originally Posted by sailah View Post
Any other ideas? Thinking of a KTM 300 mill
A 380 would be much better for a heavy quad. Same size as the 300 in the years it was made. Do 2000 -02 cases for a better stator if you want lights. Cheap easy swap for the older engines though if the price is right.
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