Yes Raptor 720, it was the Sand Mountain near Reno. You must not have been there over labor day weekend, or you would have seen the 2 fastest, quad engined, 4 strokes around. The only 4 strokes that beat us had 4 cylinders. And very very few 2 strokes could hang.

 

Hey sean,Look forard to getting out to the dunes again.I will have to let you know about Glamis,my wife isn't into traveling 12 hrs to go riding,but I could leave her at home..........HMMMMMMM
My coolant was fine it was oil coming out of the breather(at high rpms)that was bothering me,talked to a few drag bike experts they said to make a oil capture tank(working on it now)I guess its pretty typical when you run such a big bore over stock also combined with high rpms. I now have 110cc's of more air moving back & forth in the crankcase vs stock ,causing some residual amount of oil to push thru the breather
Jeff

Sean,any plans on cams & piston for your Raptor [img]i/expressions/face-icon-small-wink.gif[/img]

 

hey jeff, ya, glamis is probably better without the wife and kid. You get that guy to help u put on your nitrous yet? I bet it will be awesome once that thing is going. Ya, i would like to put a cam and piston into my raptor but i am going to college in SF right now and dont have a job now so i have no money, haha. Oh well, goes everywhere u go, just maybe not quite as fast [img]i/expressions/face-icon-small-wink.gif[/img] Keep in touch, Sean

 

<< I think the Banshee Boy has missed the point. We are using this particular forum to have some fun with each other's atv products. No harm intended -- just some fun. I really don't care about teh DS, Raptor or any other atv specifically. It is just some bench racing about who can go faster.

I guess someone who has not been part of our DS Raptor hits would see our posts as a problem but it is just simple fun. >>



You say no harm intended, But you are wasting server space and wasting MY and others time trying to wade though all the BS posts you guys are posting while the rest of us are trying to read the real info we are on this site to get. So there is Harm done you are wasting MY time. And do not say I don't have to read your posts you are some what correct I have to start reading it then scroll past it to get to the real info. It is getting frustrating.
Grow Up.

Wayne B

 

Gee Wayne,

Sorry we have used up 1k of disk space. While you are looking through the posts, try to use this post as a point of education for how to have some humor.

Thanks

 

Hay Wayne, maybe this isn't the the right for forum for you try www.tightshorts.com/ or www.relax.com/

 

Well since this is the Bombardier Forum I think we are absolved of any sins in defending the DS and taking a few shots at the Raptor and those that would come in here and take shots at our almighty DS.
And I do think it is all in good fun, armchair racing and all.
But I think it's great we have these two great quads to spar with.
And the good news is there will soon, hopefully, be a new Honda and Polaris and maybe a hot new Suzuki to join the ranks of the &quot;Hot enough for almost anybody&quot; Quad.
Geez, just two years ago I was on a Sportsman, having ridden a Honda 300EX and a 400EX, I thought there was no way I'd ever be on a sport quad. I rode a 400EX at Pismo again this summer, if I had to choose between it and a Sportsman now I think I'd just go sit on the couch and watch TV.
If Honda sticks that new unicam 450 in the 400EX frame it will be a real MX contender, but still to puny for my tastes. If they build an all new, full size 650, that could peak my interest. If they build it big and light, maybe Bombardier will shave some pounds off the DS to keep up. The new Baja seems to answer all the criticisms of the DS, except for the weight.[img]i/expressions/face-icon-small-cool.gif[/img]

 

It will be nice to have the the colors of plastic represented in the 4 stroke sport class. The 650 Honda, the Suzuki DR motor with a 105mm piston, Polaris with a trailer hitch, and Kawasaki with who the Hell knows what.

Hopefully Yamaha will see the errors of their ways and actually make a 4 valve dual cam head for the Raptor.

 

What's the matter with the Raptor head? A single overhead cam has rocker arms and a DOHC doesn't, but a SOHC is still good for 10,000 rpm, and adjusting the valves is a cinch compared to bucket shims on a DOHC, which, granted, can see 14,000 rpm in some engines. There is also the weight consideration, one less cam that high up. The Honda unicam is a clever combo of direct actuated intake valves like a DOHC, with a rocker arm for the exhaust valves. Adjusting the valves must be a kind of a pain, shims for the intake and set screws for the exhaust...[img]i/expressions/face-icon-small-shocked.gif[/img]

 

I have spent quite a bit of time working with the 660 head. Although the twin port 5 valve design provide good air speed and a resulting good torque curve, the problem I have found is the poor chamber design. Between the exhaust ports out flowing the intake and the single cam, I would really like to see either dual cams or a single like the Honda. Adjusting valves has never been a problem for me.

It might just be a personal thing but I would rather a different head design for the 660. Cosworth tried the 5 valve and found it did not work. Yamaha --- well, they keep trying.