thanks for the link CJ_DT. I guess most of these units were covered earlier in the thread.. but this is good list none the less.

hmm.. are these US $??

I am very interested about the cut down honde gearbox.... I'll ask around the forum

Yeah all those prices are US dollars, if you go to the link there is 30+ pages outlining the advantags and disadvantages of all the boxes, however I maintian that in a mini anything would do with a stockish busa.


Honda Transmission
http://www.minibuggy.net/forum/welcome- ... regon.html


here is the link to the honda transmission, biggest issue in any bike powered buggy seems to be chain speed from gearing down and short chain, much less of an issue in a mini with a smaller wheel, hence needing less gearing down perhaps?

Im also considering going down the honda transmission route, ill let you know how it goes, have chatted to the local (to me) engineering shop and he is keen to help.

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tee hee hee, 30 forward gears and 6 reverses

makes sense to use a car 'box though

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aah.. this is EXACTLY what I was hoping to do.. machine the bell housing down to nothing and shortenthe layshaft etc to make the unit small. I suppose you can use any FWD gearbox, even a starlet!, the smaller the better I suppose

Yeah chain speed will be an issue. Exaclt numbers can be worked out when we choose which type of chain we want to use. they usually give guidlines.

Nifty idea that, but do you reckon it could be done so you didn't need a chain? A direct coupling and some kind of adapter plate would eliminate chain worries, but would need more machining I guess.
Also could you remove any excess gears (like the lay shaft?) from the box so you just had the forward/reverse change and the diff? Less drag that way. Of course you could keep some to have different ratios for different events I guess.

Madmorrie's 2c

yeah I would take off all the gears I dont need. Who knows, maybe even shorten the main shaft and the layshaft so it really does become a very compact.
I dont think the layshaft can be taken out since you need it for the reverse gear.

There are plenty of cars in UK running chains so I dont see what the big deal is. As long as you stick to 13" rubber, should be ok..

I guess you could also use the starlet/honda/whatever cluster too if you use the gearbox (for the speedo).

this would have to be one of the more fruitful discussions I've ever seen take place in this part of the forum.

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But he's thriving and striving and hugging the turns.

i guess you could use either. Personally I wouldnt use the starlet one

1) Hayabusa one will most likely be electronic, so re-calibrating it to suit new wheel diameters will be easier
2) hayabusa cluster looks waaay cooler, the tacho and speedo will look neater

I'm going to get hold of a FWD gearbox from somewhere and just have a go with mr angle grinder to see how much I can take off and also if all the shafts can be shortened, after all the powertec/ quaife unit is pretty much exactly that!

Just a thing to think of when selecting a gearbox, the busas output shaft is on the LHS which means you need to find a cargearbox that sits on the RHS of the car for he output shaft to be on the rght side. The right side being the left side....

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Tomorrow is not looking good either.

B series Honda. G series Mistubishi. I guess once you take the bellhousing off you won't have the issue of the drivers side orientated gearbox hitting the steering rack.

Nissan and Toyota are on the passenger side.

pubs, starlet gearbox will cost you 5/5ths of f/all. I wonder if once you remove all the unnecessary gears it'll make the gearbox more effecient?

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But he's thriving and striving and hugging the turns.

you guys are right.. would probably have to go for a gearbox which would be on the drivers side, in the interest of keeping the drive shafts close to equal.. otherwise it would like the FWD starlet concersions now

which brings me to my next question, don't the B series honda's spin the other way compared to toyota's etc.
LOL it would be pretty funny if someone overlooked this fact!

I am sure taking out unecessary gears will not only reduce frictional losses, it will also take off the parasitic loads like the gears sloshing around gear oil and reduced intertial loads since less mass is spinning.

Hmm, didnt think about which way the different Honda motors spin, might have to look into it.

My thinking was gear it wih the chain drive so that 4th gear is the one to use, fourth is generally 1:1, so power is straight throgh the box, essentially just locked up, not dropping down through multiple gears etc? (thats my understanding of it),

Have the ability to drop it down to third for some pokey stuff, and into fifth for cruising?

Othe thing I was thinkng was to run it upside down with the chain going over the driveshaft to try and get some mroe chain length in a small area, as it seems to be short chains causing issues.

_________________
I can only please one person per day,
Today is not your day,
Tomorrow is not looking good either.