ESE's works engine tuner

[fatbastd]

FACEBOOK, FACEBOOK, don't talk to me about bloody facebook!

Yeah, 5 posts...I noticed that too...I have tended to 'live' elsewhere, but am back now. Up to page 85...impressed at the level of effort and development going into what were poxy commuter streetbikes...I had a GP125 years ago - very early one that game with GT125 forks and wheels...gave it a pipe from Ziffle (with whom I worked at the time), and turned a left-handed RG250 pipe into a right hand GP125 pipe (man they're made of stern stuff - I nearly welded the peg to the pipe to save effort!) and it was a fun thing around the street, but would be blown away by what I see here...I know ehere it is, so might have to go and retrieve it!

FB

[fatbastd]

Further to my last, which I can't seem to edit, being essentially a Yamaha man, I had an RX125 years ago which went acceptably in the commuter role for which it was intended, but was a very sweet handler - I bought a frame later to build a bike into...another project that was short-circuited...only problem with the RZ engine was the Grand Canyon gap in the ratios between 3rd and 4th..right before I sold it I checked the ignition timing - for the first time (told you it was purely a neglected commuter) and it was MILES retarded..so I set it where it should have been and it flew! And the vibration promptly blew the headlight..

Anyway, back to vicarious bucket racing..

FB

[TZ350]

Further to my last, which I can't seem to edit,

Not enough posts.

I think you have to have at least ten before you can edit and maybe fifteen before you can delete one of your own posts.

Interesting story, I love hearing about the old school buckets, the guys who made them and how they did it.

[wax]

tz350 sorry been busy basking in the glory of the win and other stuff.
You can get straight cut gears for these gearboxes so no issue with wanting to do what you are planning. I will go talk to my friend tomorrow and try and sort you out some cases.

[fatbastd]

Yeah, these days, being a little more knowledgeable, I'm aware of where I can get gears to allow different internal box ratios, with one tooth either way with a 'bastard' gear - have done it on a couple of bikes (3 sets of ratios in one box- made it quite a pricey effort!) with excellent results. I'm also onto an man who likes gearboxes and has produced his onw 7 speed version for the bike he rides (not in NZ and not a bucket), so that he always has the right gear...no there's a though, assuming the rules are not restrictive to 6 speeds..

[husaberg]

Yeah, these days, being a little more knowledgeable, I'm aware of where I can get gears to allow different internal box ratios, with one tooth either way with a 'bastard' gear - have done it on a couple of bikes (3 sets of ratios in one box- made it quite a pricey effort!) with excellent results. I'm also onto an man who likes gearboxes and has produced his onw 7 speed version for the bike he rides (not in NZ and not a bucket), so that he always has the right gear...no there's a though, assuming the rules are not restrictive to 6 speeds..

Or you could just get a Cagiva Mito that comes std with a 7 speed (most models)
Some Sachs engines also had them and i think some mineraili engines.
Then again the CT110 has eight and i think some of the old Kawa 90's had 10 lol

come to think of it some of the suzi mountain goat engines had an duel ration 4 speed i think as well.

the KEL Kart Track Destroyer engine can have different gear ratios, using a combination of standard parts unfortuantly other than maybe just selecting a different gear ratio for a particular corner they don't offer much to close up all the ratios.(other than a lower 6th) like a higher first but then again they are at least 6 speed.

Vanessa has avaiable alternate gear ratios available from the NSR150 and the CRM125 which can provide a reasonable distribution of ratios but WOB says it won't need them anyway.
The biggest problem i found was the first gears on computer bikes are always too low unless o miles high gearing which efectivly makes them a 5 speed box.
My H100 had a Close ratio box 6 speed made up from "other" models of dubious legaliy........

[Ocean1]

i think some of the old Kawa 90's had 10 lol

Cousin had one, split 5 speed iirc. I did ride it, had a standard shifter and a sort of rocker on top of the case for the split but I can't for the life of me remember how you managed the thing.

[F5 Dave]

Very awkwardly, not the sort of thing you want to do heading into a downhill hairpin.

Wonder where Ziff is nowadays? Obviously moved from Marton, had to seen him at Boxing day races, but not for, erm well over 10 years I guess.

[miper]

and had a bucket once (XL125S in a CB125T frame - only ever rode it at Ohakea, and it went well - apparently had been a very good machine)...!

I wonder......Me and Phil Bird both had matching CB125T's with xl125s motors back in the late 80's early 90's in Palmerston north, and these went really well, for that time anyway. If per chance it was my old one then yes it did go very well. Won the local A grade champs on it 1990 ish much to the dismay of the two stoke boys. Phil was the master mind of the motors and spent many hours getting them reliably fastish. They were fun times back then.

[TZ350]

Won the local A grade champs on it 1990 ish much to the dismay of the two stoke boys.

Not much has changed then .........

[TZ350]

I have been trying to get a handle on the typical CVT's "gear" ratio range.

From what I can find out it appears to be something like 3.28 to 0.84 which happens to be pretty close to my Suzuki GP's gearbox. (if anyone has better info please let me know).

If 3.3 to 0.8 ish is right then this makes it really easy to adapt as all I need to do is fit the CVT's front pulley to the crank and fit the original primary reduction gears to the rear CVT pulley and run the front chain sprocket from what was the clutch gear.

It just can't get simpler than that.

[F5 Dave]

Not much has changed then .........

That was once & not a GP. Certainly didn't happen again that Millenia. I think I bookended the Manuwatu champs (stopped about 2000 & something) on the Mighty H100.

[fatbastd]

I owned the CB125T/XL125S somewhere between 1992 and 11995. It was blue, with the original Comstar wheels, etc. Ignition died in the end and I sold it to a mate who fixed it.

[TZ350]

F5Tim



Things are warming up in F5



Different pipes, original Aprilia 50 Red line, Conti pipe Blue line.

A bit of work on the exhaust port and blow down STA should improve things a bit more.

Looks like a dangerous 10hp is a distinct possibility.

[F5 Dave]

Is that tail-piece a side cut Bucket? Very nicely done! Top marks.