Canadian Bucket build?

[slowmike]

Hello all, I recently picked up a 1990 Cb125t (tt?) and have begun my project. Hind sight I should have done more research before buying it but what's done is done. I'm having a hard time coming across a service manual as this was apparently a pretty rare bike around these parts(Canada)and my search for info has directed my here....no one has a service manual for them and even the Honda dealership has told me they are able to source and original. Does any one have a link to a manual download or any information that would be beneficial for this build? Or does any one know where I can purchase one online if need be? Thanks.

[speedpro]

I thought someone had started a thread about me when I saw your username.

Someone here is bound to be able to help. They're pretty simple really and I don't think most people bother and just use generic values like the standard torque setting for an 8mm HT bolt for the head studs etc. eh!

[jasonu]

Hello all, I recently picked up a 1990 Cb125t (tt?) and have begun my project. Hind sight I should have done more research before buying it but what's done is done. I'm having a hard time coming across a service manual as this was apparently a pretty rare bike around these parts(Canada)and my search for info has directed my here....no one has a service manual for them and even the Honda dealership has told me they are able to source and original. Does any one have a link to a manual download or any information that would be beneficial for this build? Or does any one know where I can purchase one online if need be? Thanks.

How did you come across this forum?
Maybe post the Canadian bucket rules and regs here eh... I'd be interested to see them.

[Moooools]

Hello all, I recently picked up a 1990 Cb125t (tt?) and have begun my project. Hind sight I should have done more research before buying it but what's done is done. I'm having a hard time coming across a service manual as this was apparently a pretty rare bike around these parts(Canada)and my search for info has directed my here....no one has a service manual for them and even the Honda dealership has told me they are able to source and original. Does any one have a link to a manual download or any information that would be beneficial for this build? Or does any one know where I can purchase one online if need be? Thanks.

Workshop Manual. I can't find anything free.
http://www.haynes.com/products/productID/586

Have fun.

[slowmike]

How did you come across this forum?
Maybe post the Canadian bucket rules and regs here eh... I'd be interested to see them.

Well there is no real bucket racing leagues here... I should say I'm building a bucket racer inspired street bike? LOL....I'm not quite sure how I ended up here, just searching the net for as much info as possible!.... Tanks for the input thus far guys... I think I'll be picking up one of those manuals asap.

[all4A50s]

I find this site useful for links to free manual websites;

http://www.dansmc.com/shopmanual2.htm

[slowmike]

Thanks, I'll have to spend some time searching around in there.... on a side note, can any one recommend a set of clip-ons for the cb? From what I understand the forks are 31mm and the two options I found are Woodcraft (150$) or oem cbr125.... what are you guys using on your bikes?

[Bert]

for those size forks you might be somewhat limited. try looking at some classic clip on options (BSA, Norton etc) you might find some blingy chrome ones. or maybe early TZ125 (TA125's).
Ebay might be your friend on this one..

Other option is maybe look for DAX/Monkey/Ape (Honda clone) minibike clipons (I have some recollection they are around the 28-30mm mark).

[jasonu]

Thanks, I'll have to spend some time searching around in there.... on a side note, can any one recommend a set of clip-ons for the cb? From what I understand the forks are 31mm and the two options I found are Woodcraft (150$) or oem cbr125.... what are you guys using on your bikes?

I can make you some fabricated aluminium clip ons. I am in Oregon so freight won't be a killer.
PM if interested.

[slowmike]

Ordered the manual I called the dealership. Handles are $18 a piece with throttle, ends, and levers not being much more, so I think I'm going that route. I'll post pics once some progress has been made.

Edit: I did see some 31mm clip-ons on ebay....from china. F*** that. I'd rather pay the extra to get quality parts, then anything out of China.

[Buckets4Me]

Thanks, I'll have to spend some time searching around in there.... on a side note, can any one recommend a set of clip-ons for the cb? From what I understand the forks are 31mm and the two options I found are Woodcraft (150$) or oem cbr125.... what are you guys using on your bikes?

the fast mod around this was was to use tzr250 trippleclamps, forks and wheels on the frount and to put the tzr rim on the back (with matching brakes)


gave you clipons better forks bigger wheels and decent brakes
257935 one fast CB125Twin bored out to 145ish cc


257933 shows the exaust that seems to be the go 18+hp


257934 and where they use to finnish


John C built a heap of them over the years.

I rode an older one of his at taupo and was afraid to rev it over 12,000 rpm because I had heard what they did to valves. I thought it was a slug (so use to my 2 stroke)
Finaly gave it 14000 rpm and boy did she take off (something to do with the cam JC had ground for it) And i didn't bent any valves

[Buckets4Me]

257936cb125t fxr150


257937close racing


257938some of these guys race buckets in the off season to train for there main racing (or is that the other way around they race 600 to train for buckets)

[TZ350]

....from china. F*** that. I'd rather pay the extra to get quality parts, then anything out of China.

Off topic but I can't resist, ESE.co.nz (Team ESE) exports industrial high pressure gas (CNG) equipment to China.

[Yow Ling]

Edit: I did see some 31mm clip-ons on ebay....from china. F*** that. I'd rather pay the extra to get quality parts, then anything out of China.

Good to see another man that hates iPhones too !

[speedpro]

The suggestion to swap the whole front end is a good one, later model bits, nicer internals, everything just fits together, and you end up with rims you can get good tyres for and wicked brakes. Not sure about legal stuff if it's going on the road.

[slowmike]

the fast mod around this was was to use tzr250 trippleclamps, forks and wheels on the frount and to put the tzr rim on the back (with matching brakes)


gave you clipons better forks bigger wheels and decent brakes


I would love to do that, but smaller displacement bikes ( especially old ones) aren't really popular here like other places in the world. My guess is that finding all that stuff would not only be a pain, but costly.

...as for that exhaust, is it just cut at the headers? 18hp sounds nice to me, what was done to the carbs?

[Buckets4Me]

I would love to do that, but smaller displacement bikes ( especially old ones) aren't really popular here like other places in the world. My guess is that finding all that stuff would not only be a pain, but costly.

...as for that exhaust, is it just cut at the headers? 18hp sounds nice to me, what was done to the carbs?

will take more pics at the next race meating and ask a few questions
I gave up on my one before I had it running (8 years ago) so cant realy tell you much

try ebay for the frount end

[husaberg]

I would love to do that, but smaller displacement bikes ( especially old ones) aren't really popular here like other places in the world. My guess is that finding all that stuff would not only be a pain, but costly.


...as for that exhaust, is it just cut at the headers? 18hp sounds nice to me, what was done to the carbs?

Honda front ends of that era are easy to swap around Honda had very little imagination when it came to bearings and stem sizes watch out for length though.

The PDF's at the bottom of the page list all the relevant bearing and fork tubes for most of the Honda the rest can be cross references with the Sudco catalog if you wish.

As for the exhausts i am guessing you have muffler shops in Canada they will sell you bends of exhaust tubing real cheap.
A set of high swept back pipes like t500 Triumph racer from Daytona would look real pretty aaah.
Cant find a pic but kind of like this.
258744

The fang site has a Cb125 being used a a drag bike.
http://www.thefang.co.uk/news2008.htm

http://www.thefang.co.uk/news2011.html
how to do the cdi etc. you will have to look around a bit to find it.
http://www.thefang.co.uk/news2010.html

It would be real hard to get the little Honda modern looking so why not 60's Honda gp style
Wheels of A Cb200 or similar and a seat and tank modeled on a Gp racer.
258745
or if Yamaha is your style go for one of those style tanks and seats

[husaberg]

258778258779258780
258781258782
258777

The CB750 Dyna S fits neatly in the CB125T engine cover. Yellow spot and arrow for advance are aids to track side timing adjustments.
As Dynatek don't supply a unit for the CB125T, I scanned the ones available for Hondas. The CB750 version looked to have the same size back plate as the 125, so I took a chance and ordered one from Tim Blakemore Racing (http://www.timblakemoreracing.co.uk/) The back plate indeed proved to be the same size and went straight in after increasing the length of the mounting slots, so that the timing mark viewing slot was in the correct place. I also had to mill a new pair of slots in the rotor at 60° to the existing ones. This was necessary to get the magnet on the rotor in the correct orientation to the pickups. Wiring is a piece of cake and before long it was all timed up and ready to go, dyno test soon


Using this logic it would seem any aftermarket ignition for a Cb750 can be modded to fit the Cb125t some later models were factory CDI some cdi ignitions are cheaper than Dynatek.

[speedpro]

JC here in Auckland uses reprogrammed GSXR400 ignitions I think. He runs a total loss system with a simple trigger thing mounted on the crank and the pickups on a custom backplate. I've also seen a FZR250 ignition fitted to Olly's CB125T. With no other mods on consecutive dyno runs the ignition increased power about 2hp. The other benefit was that with the extra good spark it was not so cold blooded when first starting.