A guy in my neighborhood just revived his 1990 LT250r. My friend has a 01 blaster with an RM250 dirtbike motor in it. Then my raptor 350 with an imiginary 446 kit in it. which would win?

90 lt250r:bored and stroked to 360cc,no air-box,K&N w/outerwear, 60-70% 110 octane race fuel. The rest is nitromethane. 22" razrs front and rear. Thats all i know about it.

01 blaster. Uses RM250 dirtbike motor. Nothing stock except for everything in motor except piston. 50/50 race fuel/premium gas, K&N filter, no box, new piston, geared somewhat low. A death trap!!!!

05 raptor 350 with all the upgrades i have plus a imiganiry 446 kit.

In my yard back and forth a couple times the blaster had the lt. on the road the blaster was in front the whole time and was taking it easy. Is this guy BSing us or something or is the blaster just that fast? and where would the 446 fit in here?

 

If the lt is truly a 360 (i'm about to call bs on that one, I never heard of this before and we looked all over for big bore kits for my cuz's lt) it should walk all over that blaster. I'm not sure what in the hell you mean by an imaginary 446 kit. what is that supposed to mean? does it or does it not have one? If that lt is a 360 cc, and running good, it should walk over damn near every other quad ever produced. Stock they're real quick, probably fast enough to blow away that blaster, so it should be no contest if this isn't bs.

 

I would say the 446 would take both of them, as long as you had more mods than just the 446, like port work, cam, valves and all that.

 

I really don't think so. 446's are quick, quick enough to take the blaster. But come on, a powervalve quadracer bored to 360 would be so godawful fast that it would take a stroked banshee to keep up with it. These old 250 2 strokers get horribly underestimated these days. a 310r will put the new 450's in their place and completely annhilate them in a real racing setting. To put this in comparison, in case you never actually rode or raced against a quadracer, my cousin's is an 86, non-powervalve, all stock except for a ct top-end pipe, and that thing will run down 400 4 strokes like nobody's business. The newer powervalved ones had 4 hp stock over the 86's. They would be unbelievably fast with a 360.

 

The blaster with the rm250 engine could sure as hell keep up and smoke them the 2/4 of a drag i would think?

 

Yeah, you're right, BUT, in THIS case, it doesnt seem like this dudes really got a 360. If a Blaster with a RM250 engine can beat it, I doubt he has a 360 in that LT250. For comparison, my 446 will only get beat by a stock YFZ 450 by 3 bike lengths in a 400 ft drag race. Didnt you mention before your buddy has a 446? If so, how does his run?

 

To be honest I have absolutely no interest in dirt bikes, so rm250 really means squad to me. But I have a hard time believing a 250 dirtbike engine in a blaster frame could keep up with a 360 2 stroke in a better built and lighter chassis. I mean, holy crap that lt250's dry weight is under 300 lbs! Even if it was just a worked over lt250 on the stock bore it should own anything in a blaster frame just because of the idea that a blaster would never be able to control that much power with stock suspension components.

 

yeah, i ride with a guy that has a 446 in an otherwise stock 87. It's insanely torquey, but the way he has it set up, it's hard to get a good feel for what this thing can really do. He didn't port the head, he's got a low-end webcam, hmf which is even more low-end, and with gearing that's too low. It's just a stupid setup. With the mods I have, combining the suspension that puts the power to the ground better, and mods that help more for the higher-end power, and my tall gearing, I can actually beat the 446 in a drag race about half the time because he has such a hard time getting the power to stick, and since his power is made in the low rpms like a tractor, he's shifting twice as much as me.

 

A RM250 dirtbike engine is pretty quick - on a dirtbike. I have yet to see a very successful dirtbike engine into a quad frame swap that worked as good as the engine did on the dirtbike. Like I said before, I think the guy on the LT250 is BS'n or something is wrong with it, cause it ought to smoke that Blaster, but it didnt, so I think the 446 would win. Hey kyledvor61, get your buddies together and meet me halfway to NC and we'll find out who'll win!

 

You said you couldnt find a big-bore kit for a lt250. I forgot to explan that. He took a kit for a 250r and mated that to the crank. i think he said 13 or 14 to one compression. As for the blaster it walks all over anything you put in its path so far. the LT has been the only somewhat challenge so far. I will put up pictures of the blaster soon if i can. Maybe if the guy comes over again and the blaster 250 is here then i can get a video of them racing. As for the "imiganiry" 446 kit i mean my raptor if i had a 446 kit in it. Right now i vote for the RM blaster.

Works suspension front and rear, +1+3 a-arms, +4 swingarm. Insane wheelie machine still. I took two short laps on it and got off because i didnt want to mess myself up!!!