Honda Odyssey Sportbike engine Conversion Questions

[bighead]

Some pics of how they did they yellow racers full suspension. As you can see they moved the gearbox/reduction unit over and then reversed the clutch.

The bad. With a 9" clutch your top speed is about 50mph no matter what you do. You can find a 7" like this yellow one has and do 75 to 80 tops. (I have one 7" left Rare) Notice how small the clutch is compared to the brake disc? They raced these modded Ody's in the 80 in national races. I am thinking it should hold up fine.

I know you do not have the ody engine. But just giving you some options. You never know you might some accross a sled engine and slip it in. What are your plans for the all the controls?

 

[bighead]

Make your cage like this one. Lots of people like the style. Looks like a mini sand rail.

 

[frankysfree]

Wow. You are definately the man when it comes to these odysseys. I will definately be doing the steering stop mod, as well as the full cage like the blue one, and the TRX front wheels. Do you happen to know what year and size TRX fits? I will probly also do the modified J-arms to kick the front end out some. Looks like a pretty straightforward mod. I am proficient at welding and have a nice Miller TIG setup and tubing bender so all this shouldnt be a problem.

At the moment i like the idea of the solid rear axle and boxed rear section with no suspension in the rear. If i do much more it would just be easier to fab up a tube chassis and go totally custom. Maybe for the next one...

 

[frankysfree]

The engine im using. A '90 something katana 600. After mockup ill go ahead and rebuild the top end.

 

[bighead]

With that much power you should go with rear suspension at all cost. A stock Ody is border line crazy as it is with no rear suspension. My sled Ody is fast as heck but not that fun to ride for it's easy to die. Super fun on flat ground or gravel roads though. I would consider adding even an simple suspension.

Have you thought about making a sidewinder style?

Can you locate a sled engine? Lots less work and more options. Check out this website about an Challenger Ody. This is full race ody like my yellow one. But uses the gearbox and custom axles.

When searching for parts add challenger into your search words. All the speed and aftermarket parts back in the day were from challenger. Check out the Challenger catalog. If only these parts were still around.

http://www.pilotodyssey.com/challengerhome.htm

 

[bighead]

This is the setup above. (See the splines for the gearbox?)

 

[bighead]

Sidewinder from this site. I cannot remember the members name off the top of my head. One of my favs from this site for sure. (model engineer perhaps)

 

[fowler]

with a 600 u are wanting independant rear suspension

search edge products piranha
it has an inexpensive single a arm type useing uni joints
i can explain it better with pics when i get mine back

u can use no suspension or a single swing arm but alot of sped and fun will be lost (or ususeable anyway

the only problem with bigheads pics is seriously limited travel, bad camber change and over extentsion or over compresion will lock the uni joints and rip the back end of the buggy out

EDIT that is modelengineers sdewinder

u can buy it for $2500 i think
it has been for sale for some time

 

[frankysfree]

Thanks guys. Ill check into the rear suspension. I dont really want to be into this for a whole lot of money though. I got the engine by trading out $50 of my labor and the odyssey was for the most part free. I just bought a bansheee complete rear end off ebay for $180 shipped so if i do rear suspension it would have to stick with the swingarm idea like i started.

My plan for this is not to do much off roading though. I plan to have my buddy do a cnc port job on it when i rebuild the top end, and ill probly do some drag racing and run it around in fields as the area im located in i dont have alot of off road areas and it would require trailering quite a ways but the drag strip is a few miles from me...

 

[frankysfree]

The rearend i bought. I plan on using only the rearend and not the swingarm.

 

[fowler]

biggest issue is how wide it is

 

[frankysfree]

biggest issue is how wide it is

The axle or the ody? I believe the stock banshee axle is about 34-36" but the whole reason i chose the banshee rear end is it has four bolts which hold it onto the swingarm and will make a good mounting point to fab up a bracket to hold it to the ody, AND they make tons of aftermarket axles for the banshee in wider lengths and also much stronger than stock. Win-win.

 

[frankysfree]

Well i got the rearend in today. Starting mockup but it looks like it will be a good fit. The stock banshee axle is 35" from hub to hub which is kinda short(about what the stock ody width is) but i was already planning on going with a wider + stronger axle so this will work good for mockup and ill source a new axle once its ready to roll.

 

[frankysfree]

I still have not figured out what honda TRX fourtrax hubs fit on the ody. Any idea? I want to go ahead and get the hubs and rims so i know the specs while setting this thing up.

 

[bighead]

The TRX hubs from the mid 80's will work. I think they are all the same. Look for the TRX 86,87,88,89 250r fourtrax. Or the FL350 hubs which weigh more though. You will need to cut the brake part off of them to make them lighter. This is just for the front though. Not sure about the rear hubs but you have banshee hubs for that.

If you find the fl350 hubs it's a sure fit for they are all the same but weigh more than the trx fourtrax hubs. I am pretty sure the first generation fourtrax hubs will work though. mid 80's.

How are you going to line up the sprockets? Can you flip the axle over?

 

[frankysfree]

The TRX hubs from the mid 80's will work. I think they are all the same. Look for the TRX 86,87,88,89 250r fourtrax. Or the FL350 hubs which weigh more though. You will need to cut the brake part off of them to make them lighter. This is just for the front though. Not sure about the rear hubs but you have banshee hubs for that.

If you find the fl350 hubs it's a sure fit for they are all the same but weigh more than the trx fourtrax hubs. I am pretty sure the first generation fourtrax hubs will work though. mid 80's.

How are you going to line up the sprockets? Can you flip the axle over?

Thanks. Ill get em coming.

Yeah, i already unbolted the swingarm from the carrier and flipped it over. Got the engine on the lift and rearend sitting behind it. Looks to be a great fit and shouldnt have any clearance problems whatsoever.

Also ordered some rims for the rear banshee hubs and as soon as i get the front hubs ill order the matching rims for that. I used some cheapo ITP steel rims for now which cost me $30 a piece brand new. Ill probly go with better ones down the road.

 

[bighead]

Remember to get that engine as low as you can. Down inside the frame if you have to. You can make the engine cradel bigger like I did with my sled Ody. With this method you can make your rear fender mounts wider and making the enginbe cradel wider if you must. You engine is smaller that my sled engine so it might drop right down inside the cradel if your lucky.

You should be able to get the engine low in the frame. Try to make the pivot point on the swingarm level to the sprocket shaft on the engine. When these two are level and inline the less your chain is moving around.

This sled Ody is borderline top heavy and it not really up that high. I stress to get that engine as low as you can. The original Ody motor mount can make a great skid plate. Also see if you cannot use the original ody moter mount to mount your engine. It has the perfect bend to get an engine low. http://www.ebay.com/itm/B-1979-FL-2...Parts_Accessories&vxp=mtr&hash=item256893d33c
Not sure if it will work in your case but worth looking into if you have the part.
http://www.youtube.com/watch?v=j-RXoEyzYjI




Try not to stick it up in the air like this. They will be top heavy. Never mount the engine up high on the engine cradel.

http://www.youtube.com/watch?v=tPipGlLbRBg&feature=related

 

[bighead]

post a pic of your mockup????

How long is it? Can you mount the engine on the swingarm? What are you going to use for shocks?

 

[frankysfree]

Good ideas on the engine mounting. I'll be mounting it pretty low with the oil pan being about even with the bottom of the swingarm.

I'll post pics up tomorrow of the mockup. All I really did right now was use wooden blocks to get the engine and rearend up where they need to be. I'll be getting all my measurements and doing it proper once I get the wheels in. I know where the engine is going to mount but I need to see where the axle will mount so the ody isn't to high or low in the back.

 

[B man]

Remember to get that engine as low as you can. Down inside the frame if you have to. You can make the engine cradel bigger like I did with my sled Ody. With this method you can make your rear fender mounts wider and making the enginbe cradel wider if you must. You engine is smaller that my sled engine so it might drop right down inside the cradel if your lucky.

You should be able to get the engine low in the frame. Try to make the pivot point on the swingarm level to the sprocket shaft on the engine. When these two are level and inline the less your chain is moving around.

This sled Ody is borderline top heavy and it not really up that high. I stress to get that engine as low as you can. The original Ody motor mount can make a great skid plate. Also see if you cannot use the original ody moter mount to mount your engine. It has the perfect bend to get an engine low. http://www.ebay.com/itm/B-1979-FL-2...Parts_Accessories&vxp=mtr&hash=item256893d33c
Not sure if it will work in your case but worth looking into if you have the part.
http://www.youtube.com/watch?v=j-RXoEyzYjI




Try not to stick it up in the air like this. They will be top heavy. Never mount the engine up high on the engine cradel.

http://www.youtube.com/watch?v=tPipGlLbRBg&feature=related

Haha I love how evey thing goes good until the guy gets over cocky and try's to do the wheelie again. Hilarious!