cb 750 go-fast goodies and machining tricks

[speedy88101]

[TOOLS1]

Welcome to the forum. Guess the cat got your toung.
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[speedy88101]

I have a couple questions I'm a paraplegic and me and my dad are trying to build a reverse trike with hand controls for me but we're having problems figuring out a powerplant we have an abundance of single overhead cam cb 750's we were thinking of using one of them putting 1000 juggs and a turbo on it to push all the weight and be able to have more than enough power to just push it what do you guys think about this also I read somewhere you can have the crank milled to turn higher rpm's what I read said you could turn 14k rpm's just wondering if thats been done or can be

[speedy88101]

thanks for the welcome I'm not too awful computer savvy so thats why it's just the topic so far

[TOOLS1]

I would use an automatic (76-78 CB 750 A) engine. You would not have to worry about a clutch, or oil tank. Also the shifter would be really easy to do, and the torque converters are bullet proof. I do not think a lightened crank, and 14K would hold up to the weight of a trike, but, you could talk to the folks at Cycle Exchange. They know CB 750 horsepower.
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[speedy88101]

my dad suggested an automatic it's a great idea but I would sort of like to use a non-auto just to say we did it and I appreciate your input tools

[Piute]

   Been keeping my eye out for Ideas on a trike myself,but don't plan to build soon,have road ole H.D.'s with suicide clutch n shift ,So hand clutch and shift would work for you .Seen a sight guy put a small trailer onto the back of his bike.well rear tire was center to trailer tires ,then it attached some how,I would say like a hitch so suspension can move freely sells the kit really cheap on "E".I will be better at my wielding by my time to do it

[speedy88101]

yea this is gonna look more like the t-rex with car tires in the front if we decide to use a non-auto then I was thinking we could use a butterfly steering wheel and put the clutch on it and put the brake and throttle on the shifter itself I'm not sure what style trike your planning on building but if you plan on building the traditional trike with the two car tires in the back I've heard you can use a shaft drive bike and pull the pumpkin off with the back tire to put a toyota rear end on the end of the shaft just what I've heard though and might be harder than it sounds but just a suggestion

[Re-run]

I think you would have less trouble doing a rear trike but a front trike would be more stable in corners.
On the engine, The first thing I would do is port the head and drop in a bit of a hotter cam. I don't know if I would do 1000 on it. Word is they could suffer from oil leaks a lot more, ran hotter, and once worn out, that was it. The bore was so large that the 1000 sleeves could be seen between the fins on the outside.
Wiseco makes a good 836 kit and cyclex makes an 850. I guess a lot depends on how much you want to put into it for $. If you want to keep is somewhat reasonable, do the porting and mild cam bump.

[Daddyman]

I don't know how fast you want to go but I'm sure a fresh rebuild on one of those 750s would give ya enough power, especially if you do a hotter cam and little things like that.  I used to drive a 66 VW bug with the original 36 horsepower engine in it and it would do 70mph all day, the 750's are like at 63hp

[Lucky 1]

Looks like the cat got everything. LOL

Why not put a small car engine in the trike like a geo metro or a VW bug engine?
You could trade the CB750 engines?

[Piute]

  350 would work but thats been done.