650 honda motor on trx450

[liledg]

honda has a old 2wheeler with a 650 motor, who knows what it would take to put one of those motors on a trx450.

[400exrider707]

Two things, time and money.

[pro-rider46]

there was a guy on here a few months ago putting a xr650 dirtbike motor into a 450r. idk how far he has made it...


honestly, if you are considering it, you might as well just keep the stock engine in it, and just build it up. and it will nearly be the same hp output of a built 650, but if you really want to do a motor swap. they have Cbr 1000's, R1's, Gixxer motors on ebay, and cost about a grand when the shipping is all in.

[liledg]

Originally posted by pro-rider46
there was a guy on here a few months ago putting a xr650 dirtbike motor into a 450r. idk how far he has made it...


honestly, if you are considering it, you might as well just keep the stock engine in it, and just build it up. and it will nearly be the same hp output of a built 650, but if you really want to do a motor swap. they have Cbr 1000's, R1's, Gixxer motors on ebay, and cost about a grand when the shipping is all in. as you can see iv done my motor up already. if you can pm that guy that will help me alot.

[D Bergstrom]

You would need either a custom frame, or would really have to cut up the stock one, the 650R motor is alot taller then the 450R motor and would not fit in the stock frame.

A couple of guys that race the pro class in the series I run built a hybrid 650R powered quad. Pretty much engineered the suspension and geometry. The quad is bada** and works good, they just seem to have alot of stupid things that happen to cause DNF's. It was actually in Dirt Wheels sometime in the last year, I know I kept that issue. They have ALOT of money into it also.

Doug

[liledg]

wow custom frame. well i gess that will b afew grand just for the frame, 1 ? what year and model 2wheeler is the best 2 use?

[D Bergstrom]

Originally posted by liledg
wow custom frame. well i gess that will b afew grand just for the frame, 1 ? what year and model 2wheeler is the best 2 use?

There was a guy that races down in Baja that built two 650R powered 400EX's. I have never seen them in person, but they were for sale months ago and I saw pictures. I do not know if the frame had to be modified, but I do believe the 400EX engine is taller, and therefore the frame would be taller. Might be worth checking into.

Doug

[NickG5755]

this guy did it in a warrior and 400ex

[liledg]

thanks 4 the help i was wondering if a xr650r water cooled motor will fit on a trx450r frame. you you guys know where i can get a xr650r cheap pm me thanx.

[NickG5755]

450R frame? im gunna guess no...

400ex frame has a much better chance..

[D Bergstrom]

Originally posted by liledg
thanks 4 the help i was wondering if a xr650r water cooled motor will fit on a trx450r frame. you you guys know where i can get a xr650r cheap pm me thanx.

All my posts have been about the water cooled XR650R motor. That is what motor I thought you wanted to use.

Doug

I know for a fact it fits into the 400ex frame pretty nice. When I get my 400ex finished and I save up extra cash I want to go for a XR650 motor in a 400ex frame. So I will have a modded 400ex and a XR650ex lol

[TheNewn]

You should just get a custom frame built for it, using 450R or 400EX geometry so parts would be easy to find. The frame would probably cost you a couple grand, and you're probably better off buying the whole XR650R bike,taking what you need out of it, and selling the rest as a roller. That wy you would not have to piece together the motor, the carb, the wiring harness and what not. you could have it all in one spot.

[liledg]

yea your right i want a hole bike so i can build the motor and then dyno it b4 i take the motor off of the xr650r.

[400exrider707]

I think most people here are confusing the two 650 motors. One is air cooled and looks just like a 400ex motor, that's they typical transplant for the 400ex frame. The other motor is liquid cooled and produces a lot more power, but it is taller.

Personally I wouldn't even waste the time putting a 650 motor into the 450R. The 450R motor can probably be built to be faster.

[D Bergstrom]

Originally posted by 400exrider707
I think most people here are confusing the two 650 motors. One is air cooled and looks just like a 400ex motor, that's they typical transplant for the 400ex frame. The other motor is liquid cooled and produces a lot more power, but it is taller.


Just to expand, the water cooled is the XR650R, used in the dirt bike. The XR650L is the aircooled motor, used in the street legal dual sport. I really do not think anyone puts the XR650L motor in anything. Before Honda made the XR650R, they made the XR600, this motor has been used in quite a few swaps. The post I made about the 400EX frame was in regards to the XR650R motor.


Originally posted by 400exrider707
Personally I wouldn't even waste the time putting a 650 motor into the 450R. The 450R motor can probably be built to be faster.

Doubt it. Compared to a 650L motor or a 600 motor, yes, the 450R based motor motor would probably be better. I think a built 450R based motor would have a hard time with a built 650R based motor, the 650R motor is one bada** motor. I also think the built 650R motor would be more reliable the the 450R based motor. (I guess I should add a disclaimer, a motor being faster then another is really not a good way to describe something. The 650R based motor would have more horsepower/torque then a 450R based motor. Depends on what type of riding if a quad with one motor would be faster then another.)

For me, a desert racer, I would love to have a XR650R motor in a 450R based machine, I just do not want to spend the money to do it right. I know LSR makes custom frames, one of these days I will call them to see what they could do.

Doug

[liledg]

Originally posted by D Bergstrom
Just to expand, the water cooled is the XR650R, used in the dirt bike. The XR650L is the aircooled motor, used in the street legal dual sport. I really do not think anyone puts the XR650L motor in anything. Before Honda made the XR650R, they made the XR600, this motor has been used in quite a few swaps. The post I made about the 400EX frame was in regards to the XR650R motor.



Doubt it. Compared to a 650L motor or a 600 motor, yes, the 450R based motor motor would probably be better. I think a built 450R based motor would have a hard time with a built 650R based motor, the 650R motor is one bada** motor. I also think the built 650R motor would be more reliable the the 450R based motor. (I guess I should add a disclaimer, a motor being faster then another is really not a good way to describe something. The 650R based motor would have more horsepower/torque then a 450R based motor. Depends on what type of riding if a quad with one motor would be faster then another.)

For me, a desert racer, I would love to have a XR650R motor in a 450R based machine, I just do not want to spend the money to do it right. I know LSR makes custom frames, one of these days I will call them to see what they could do.

Doug also a xr650r motor is a 649cc. but the 700xx motor is a 686cc, so all you got to do is put a 700xx bore on a xr650r motor and now you just big bored your xr650r. now if you want to stay carb you stay with the xr650r head, if you want to go fuel injected you go with the 700xx head and wiring and etc. gonna cost alot but it can b done with some time and money.

[400exrider707]

Originally posted by D Bergstrom
Just to expand, the water cooled is the XR650R, used in the dirt bike. The XR650L is the aircooled motor, used in the street legal dual sport. I really do not think anyone puts the XR650L motor in anything. Before Honda made the XR650R, they made the XR600, this motor has been used in quite a few swaps. The post I made about the 400EX frame was in regards to the XR650R motor.



Doubt it. Compared to a 650L motor or a 600 motor, yes, the 450R based motor motor would probably be better. I think a built 450R based motor would have a hard time with a built 650R based motor, the 650R motor is one bada** motor. I also think the built 650R motor would be more reliable the the 450R based motor. (I guess I should add a disclaimer, a motor being faster then another is really not a good way to describe something. The 650R based motor would have more horsepower/torque then a 450R based motor. Depends on what type of riding if a quad with one motor would be faster then another.)

For me, a desert racer, I would love to have a XR650R motor in a 450R based machine, I just do not want to spend the money to do it right. I know LSR makes custom frames, one of these days I will call them to see what they could do.

Doug

Most 400ex's with 650 swaps I've seen use the 650L motor. Looks like stock. I guess I should have clarified. I wouldn't waste my time putting a 650L motor in... they're not that much more powerful than the 400ex motor.

The 650R motor yes is a very good motor. How much more does this motor weigh though? What would a built 650R put down for numbers?

I saw that baja xr650r 400ex swap in dirt wheels also. That was pretty sweet. I wonder what kind of hp one of those smaller 250cc pro krotch rocket bikes produces. Those are small should slide in easier.

[project400ex19]

I have a 400ex frame in my basement, I was going to use it to make a CRF hybrid. But I will part with it. I bought it for cheap off ebay and will sell it for what I have into it. pm if interested. For a few more dollars I can gusset it for you.

[hendershot106]

why dont you save yourself a lot of hassle and just buy a 700XX? seems like the logical thing to do to me... if money aint an option to you anyway.... you will have a complete bike.... no reliablity or compatability issues.... hop on it and ride.....

[liledg]

Originally posted by hendershot106
why dont you save yourself a lot of hassle and just buy a 700XX? seems like the logical thing to do to me... if money aint an option to you anyway.... you will have a complete bike.... no reliablity or compatability issues.... hop on it and ride..... 700xx very very heavy, cant buy a long swinger, dont know anyone that knows how to work with the fuel injection on a full built motor yet. are you starting to get the picture? not gonna spend all that money with them problems. custom frame made to work with the xr650r motor, and trx450r running gear. go have fun.