hmm actully about 3 months now... ive heard alot of godd from this idea... some bad.. and then you guys lol. but maybe i will go and get a 250r ... do you guys think it would be that much betteR??... wut about a 250r w/ a yz250 engine?? [img]i/expressions/face-icon-small-smile.gif[/img] i like the 250 engine cuz its nice.. puts out about 50-55 stock... thanks for your guys advice though i think i mgiht look into a cheap 250r. maybe even just trade the balster for a old crap 250r.. and restore it .. hm hm ideas ideas ideas!!

 

If putting a modern, non-counter balanced 250 MX engine in a quad is such a good idea, why don't you see them every where? Ballance and Yokely both rode the Factory Kawasaki GNCC quad. Ballance could only take it for one season before he quit the team and Yokely only made it 2 years on the quad before he went back to a Honda TRX250R engine for this season. This was with Doug Roll building the quad specifically for the KX250 motor. In the MX ranks, I've only heard of one guy running one in the 250 class (an A rider at that). If you really have researched this subject for 3 months, I would like to see where you have been looking. Everywhere I look, everyone agrees that this is a bad idea, including the TRX250R specific forums that I frequent (I owned a 250R until last month when it was stolen). If anyone would try it, know about it, and recomend whether or not to do it, that's where you would find out the truth. The only people I know of that have had any success with these kind of setups are hill shooters. You know, the guys that sit around all day and ride for 6-8 seconds at a time in a drag race up a hill and the only real riding they do is back and forth from their truck to the hill.

 

cbu just to make a point the yz250 engine would be more reliable then a 240 blaster engine and have more power so why not and it will be a fun project he'll just need to do some extra bracing and vibration stuff
and ya he made a good point new brakes would be a good idea but expensive

 

The transplant has been done many many times successfully..these people that decide to take on the projects naturally do them right by counterbalancing them while making the motormounts and such..they arent going to leave it halfa$$ and try to sell it like that..especially if the guy stuck money into susp mods to handle it..they RIP and are almost ALWAYS put together greatly.and yes the YZ250 motor RIPS and is very reliable and it sounds to me that the machine u are wanting sounds perfect for you if u really wanna wax some 250 Riders with your size..the blaster frames geography is nice for the right sized person..later

 

thank you.. i never considering the counter balance a problem... but these guys were instist that it would be..

 

yea, no problem...I know how everyone else thinks, just as I would if i didnt have a badass blaster myself, cause I know how alot of people do see it as being since its a slow stock quad its NEVER good enough no matter what is done to it or it cant be as superior of a quad as the bigger displacement quad because of its crappy stock form..but we know what a blaster can be transformed into..anyways..no problem and later

 

I've got to seriously disagree with CBUS660R. As a matter of fact, you do see them everywhere. Have a good look at the Glamis dune race pictures in the various magazines. Most of the quads have had the original engine pulled and a MX mill put in. Its the best hp increase for the money. The vibration issue is pure myth. Youre not talking about a weight loss vibrator belt like people in the not-know would like you to believe. You can always spot someone who talks without experience. Vibration is not an issue. I own and ride a Yamaha Raptor based mod-quad with the most vibrating engine ever made....the XS650 twin! leave the kill switch off and hit the starter button and it rocks back and forth as the engine turns over. Start it up, and it purrs like a lion. have a look....
http://www.puremediahosting.com/gall...1/Project_XSRc Build what you want. Ride what you build. Be proud.

 

WELL SAID!! :-D

 

Atious, I did say that you do see them in the dune scene, be thorough and read everything that I write . I am talking about shoving a non-counterbalanced 2-stroke MX bike motor into a Blaster (or any quad for that matter) for motocross use. These hybrids do not hold up well in MX. HiPerBlaster26, tell me how these guys are counterbalancing these motors? I know on my 250R, the counter balancer was internal, driven directly off of the crank, and has totally different cases from the CR250 motor that it is roughly based off of. Everyone in here is so quick to say you are wrong without thinking about the application. We are talking about taking a modern 50+HP MX motor and putting it into an entry level sport quad that was designed in 1986 and trying to motocross it. Say all you want about guys doing all kinds of crazy SH*T for dune shooting or trail riding, it is not relevant to what we are talking about here. We are talking about motocross, where stock 400EX and 250R frames have a hard time holding up with mildly modified factory motors. I am not talking about casual trail riding, I am not talking about hill shooting, and I am not talking about TT racing. Pull your heads out of your ***** and read everything that is written, not just the part you disagree with.

 

Alright CBUS660R
i am at school right now but at home i have a article from DW of a MX RACER that did this... so dont tell me it doesnt hold up because it does.. its been done and it works.. your only going on facts and **** that you dont know.. go look at someone that has done it already and then tell me what you think.