Largest honda engine size with semi-auto clutch

[Autophysn]

Ok, I am sure like many of all of us, we have been riding for years. For some, now it is our turn to play the Dad. So I ask this question with a heavy heart.

What is the largest production Honda engine produced that has a semi-auto/centrifugal clutch and preferably reverse?

Project, My son's Go kart. Has a cheapy Chinese engine with no low end. He has gotten to be a good little driver, so now it's time to give him some power.

I don't like the idea of killing a trike to get performance for a go kart, but it's spirit will live on.

I am thinking maybe a 250sx

Any thoughts?

[bad350]

yeah as far as 3 wheelers, a 250 big red or an sx but they are shaft drive not sure that any chain drive honda's have reverse

[Autophysn]

Thanks, I did not know that. This is why I ask my fellow trike enthusiast

[Bigbore]

Just use a 185S engine. No reverse but has decent power and it's light weight. Oh, and they're cheap.

[DeePa]

they also made 200s engine, no electric start though...id say look for a 200m engine, have it ported, get a cam, high comp piston and all that jazz...make it move a little bit

[firehart]

You could always use a 110 with the two speed transfer case.

[Vealmonkey]

Honda did make a cb400automatic, a cm400 automatic and they also made a cb750 automatic!!! I think they might have made a 500 automatic in the police trikes too, but I can't swear on that.

[dogger]

the 450 foreman and I think they got a 500 fourtrax with a auto clutchin them. personally build it like a shifter kart with a cr250r and he'll have all the power he will ever need.

[Autophysn]

Hell Yeah!
I would love to get my hands on a CB motor.
But that will be later
Guess I should have elaborated a little
let me see if I can get these pictures up....




My kid is only 8 but he takes after his dad, drives like he stole it

So you see how a CB anything would be way too much.
I actually purchased this Chinese 110



Thinking I could strip it down and use the engine, tires, etc to make it a kick ass little buggy. But these Chinese motors really suck.

Believe me, I have a nice 110 that runs great!



I would hate to tear this thing down, but don't think I haven"t given it a thought

I would prefere to look for something else, But we play in the sand, so he will need plenty power to spin paddle tires.

You may ask, Why go through all the trouble, My kid loves his Batmobile, and My wife likes the roll cage.

[willrideanythin]

Check this out. I have a 110 just like that, Well kinda, LOL.
http://motors.shop.ebay.com/merchant/0bonehead0
Use this engine.

[Vealmonkey]

Those engines like that are based on the z50 and atc70 sized engine cases. The honda atc110 is slightly bigger and the bolt hole patterns are a little different. If you are a fabricating kind of guy, I would look into maybe a honda 185/200 series engine. I would also be looking into an oil cooler which would help with the engine life alot. You will have to be refabbing your engine mounts either way you go with the 110 series of engine or with the 185 series engine. You can always go with a honda 125 engine which will give you electric start. You should be able to find a mild cam for it and with some type of fabricated exhaust and a nice airfilter, you should be able to pick up some extra power.

[Autophysn]

Nice! Appreciate the feedback, So my 110 engine mounts would be different?
Don't mind the fab work, but how different? Drastically, like total re-fab, or minor move this and that?

[carscomefirst]

trx125 has eletri start and reverse. I think 84-86 is the same style as the 110 and 125m.

[Autophysn]

haha, like the name, carscomefirst
Thank You for the info!

[Vealmonkey]

I think your weak point might be the cvt transmission. Between the low power of those engines and the cvt transmission, I can see why it would be underpowered. I don't know if you could find a better go kart clutch, like a comet or something else. The trx90 has the same size engine cases as the atc70/z50 but once again, they use 4 speed auto clutches. I think the problem is that the power range of those engines is pretty small and your are probably talking 5 hp maybe. You have to be losing alot of power with the type of slipper clutch.