xr650 engines

[christophere251]

Has anyone put one of these on their quad? How does it perform and what kind of power does it make?

Originally posted by christophere251
Has anyone put one of these on their quad? How does it perform and what kind of power does it make?

People did it b4. The motor is around hte same size as stock. Some people on here have one. Honda is sosposed to have one come out i think in 2007.

[400exrider707]

Originally posted by Dhumpalo
People did it b4. The motor is around hte same size as stock. Some people on here have one. Honda is sosposed to have one come out i think in 2007.


Ha right, that rumor goes around every year, and it never comes out.

[XR650]

Yea, if you want a 650ex, you'll likely have to build it yourself, here's mine

[XR650]

Originally posted by christophere251
Has anyone put one of these on their quad? How does it perform and what kind of power does it make?


As far as what kind of power the xr650L makes, it responds to mods just as any other powerplant, my current 717cc build is putting out ponies in the 70's, not too bad for what is in it, just your basic big bore, cam, piston, carb, porting, and exhaust.

[BigFish]

The concept is badass, but I am going to call BS on 70 horsepower. A stock xr650L puts out low 30s at the rear tire (I've seen dyno sheets of stock ones not even breaking into the 30s). A 40 hp increase is just not possible on that motor. A fully built xr650L motor will put down some numbers in the 50s but reliability is sacrificed.

I have a hard time seeing a 70+ hp motor not even have mandrel bent pipes. Also, what kind of carb are u running?

[CHEVYZ]

How much HP he is truly running is on the table, but that bike is no slacker! I have witnessed it take down some extremely fast bikes that I know are pushing good numbers!

[christophere251]

xr650 do u have any pics of the build?? How much fab was involved? Im thinkin of using the liquied cooled version in my quad. Ive read on the xr forums and u can take a liquid cooled 650 and take the baffle out do and air box mod and some jetting and go from 41hp stock to 61 hp!! I dont doubt ur numbers at all. The xr motor is all choked up with epa equipment from the factory. I notice urs is elec start what year motor did u use?

[GPracer2500]

The owner of this quad is registered here, but I don't think he's ever posted.

http://sandsports.off-road.com/dunes/article/articleDetail.jsp?id=353848

It's pretty much 100% custom.
http://www.sandbros.net/projects/680r/rollerleft1.jpg

I have an XR650R. Uncorked they do not make 60+ hp--more like 45 at the wheel (w/ amazing torque right off the bottom). An HRC kitted XR650R gets between 50 and perhaps 55. I believe 60 can be had with a reasonable level of reliabilty--but it would take a lot of work. I'm guessing the above quad would dyno around 55 w/ dyno tires. But the torque!




XR650, your quad is sweet--I really like it. But I can't see 70hp coming from a XR650L engine unless maybe it got a huge shot of nitrous.

[2004exrider]

woah only low 30's thats lower than i expeced, heck the 400ex has 28hp. Wouldnt you be better off putting in a different motor?

Jimmy

[bayou boy]

even if the 650 puts out low 30's and the 400 puts out 28...which is a high number. you are still 4 to 5 hp higher with a stock 650 motor. once you start to mod....bigger bore, higher comp, good cam, port work and good carb i am sure the numbers would be alot higher....how high i do not know but one thing i am sure the 650 definitly has over the 400 is way more torque. one good thing about using the 650 motor is it looks kinda like a 400 motor so it wont draw much attention to it self at first....great sleeper

[GearHeadz400ex]

sounds badass, any frame mods have to be done besides motor mounts?

[Franky G]

will a 400EX header bolt right up to a XR650L motor ??

[trxridr]

hey xr650 i love the bike, how much did the motor cost? did you buy new or used?

[XR650]

Originally posted by CHEVYZ
How much HP he is truly running is on the table, but that bike is no slacker! I have witnessed it take down some extremely fast bikes that I know are pushing good numbers!

I see someone has seen it run and has become a believer in Honda 650L power , thanks for the props, I remember ya'll from Sicily Island drags.
Although alot of folks on here don't believe it, but we are running in the 300' Sand Drag world with this 400ex/xr650L conversion quad, now at 717cc's on alky surpassing h/p in the 70's, and 80 is not that far off, this is a n/a motor, no nitrous or nitro, all motor, been building this powerplant for 10 years now and we have come up with all the goodies to make these #'s on the 650L motor, alot are custom not on the shelf parts but work for the drag world,yes it is around low 30's on h/p stock but it responds to major mods just like any other motor, look at the Raptors and DS's, they are all there in the 70's as well at the sand drags, if you don't pull up to the line with h/p in the 70's on these big 4-strokes you don't stand a chance, some people on here say it's not possible with the xr650L motor, well HELLO it is, of course reliability is gone to a point, but we are dragging 300', does'nt matter, just another race motor, we also have parts lined up to make the xr650L into a 800cc drag beast, should be in the 80's on h/p easy and n/a at that, see all non-believer's at the line.
:)

[XR650]

And to all previous replies, as far as fab, no it does not just go right in, much fab is required, all components you think look like they are in stock location, they are not, everything has been moved some here and there, lot's of fab and work to even make it look like it does right now, it is still in( rough first time out )shape now, we will be tweaking some things here and there to make it look even a better install as we have time, but as of now we are tuning different carbs, cams, and the works to make it faster, looks can always come later after most see the back end of it, LOL.
It's been a great project, hope some more people would tackle it, the xr650L motor has what it takes, some find out the hard way :)

[XR650]

We are doing some test-n-tune at Prairie Sand Drags in Cleveland, TX on Sat. Dec. 16th 12-8pm, come on out and hand it out or get you some, whatever is your game !:)

[XR650]

Originally posted by BigFish
The concept is badass, but I am going to call BS on 70 horsepower. A stock xr650L puts out low 30s at the rear tire (I've seen dyno sheets of stock ones not even breaking into the 30s). A 40 hp increase is just not possible on that motor. A fully built xr650L motor will put down some numbers in the 50s but reliability is sacrificed.

I have a hard time seeing a 70+ hp motor not even have mandrel bent pipes. Also, what kind of carb are u running?

When I get mandrel bent pipes I will gain more h/p that some say is not available,LOL.
As far as what (carb) I am running, I am running DUAL FCR 39's on methonal, but have also run the Lectron and TM 48's with decent results.:)

[XR650]

Just thought I'd dig this thread back up, it's been a while, been doing some tweaking on the ole' 717 motor on the Dyno the other day with decent results.

Pulled 76.8 h/p and 57.5 torque, all motor.

The 761 stroker motor I'm building now should easily surpass 80 n/a

[XR650]

I'll try a pic of the dual fcr 39's

[XR650]

Here's one of the new pipes

[GPracer2500]

Good work. Those are incredible numbers.

[250exkid]

stock motor just with like a slip on how fast will this motor make my 400ex go??? im looking into buying one of these motors and also were do you by them and do you have to run dual carbs? because i hope you dont i really cant afford a gas hog with prices at 3.20$ a gal up here, so plz fill me in

[XR650]

I bought a whole xr650L bike to start off with, you need the wiring harness and all electrical components for the motor swap, it's quite a bit of fab to do the conversion, if you have to pay someone to do it , it won't be worth it.
Also if you were just to put a pipe on the 650 by itself, not much gains there, it takes quite a bit of major engine work to make it fast.
When my 650 motor was stock with a pipe I used to get beat by 400's with a full pipe and carb on them all the time.
The 650 motor only puts out around low 30's h/p stock, you can easily get the power your probably looking for out of the 400 with just a full pipe, cam, and carb. There is no real advantage to go to the 650 unless you are really gonna pump it up a bunch.
As far as your dual carb question, it is not necessary, I switch back and forth between a single and dual carb set-up all the time, I just get more peak power from the duals.

[XR650]

Here's another pic I found of my Warrior/Honda 650 conversion

[XR650]

Originally posted by BigFish
The concept is badass, but I am going to call BS on 70 horsepower. A stock xr650L puts out low 30s at the rear tire (I've seen dyno sheets of stock ones not even breaking into the 30s). A 40 hp increase is just not possible on that motor. A fully built xr650L motor will put down some numbers in the 50s but reliability is sacrificed.

I have a hard time seeing a 70+ hp motor not even have mandrel bent pipes. Also, what kind of carb are u running?


Here you go Big Fish, this is on all motor, 105.5 mm 14:1 piston, stock stroke

[Hondamaster5505]

DELETED


Thats alot of torque and horsepower!

[250exkid]

ok thanks

[250exkid]

a stock XR650L engin with a pipe and air filter will that goes as fast or faster then a 450r thats maby got a pipe and filter??

[Sandman69]

XR650 that is truly amazing. I am very motivated to do an engine swap after reading this whole thread. What have mods have you done to make this such a hoss?

Amazing

[250exkid]

im askin the question a stock 650 to the stock 450r are they the same or the 650 alil faster?