Bucket development: A few questions for the wise ones

[gatch]

I have a head like this on my 500, works fine for watercooled as water flows over insert (& o-ringed). Wouldn't try it for aircooled.

Stupid laws of physics..

Just had another though on it.. Because of the poor heat conductance, the inner piece would grow faster than the outer.. Then you might end up with a 3 part head..

[Bert]

Well I am building a water cooled engine, so this could be a good idea. more thinking required.

and stuff the laws of physics; whats the worst that could happen???

[Bert]

double post

[gatch]

Well I am building a water cooled engine, so this could be a good idea. more thinking required.

and stuff the laws of physics; whats the worst that could happen???

If buying the insert wasn't out of the question (ie conflict with "perfomance parts rules, or $$$ conflict", then I dont see that it would be too difficult to machine in a proper bore in the head to accept the squish insert. Or even make an O ring groove if there is room ?

[Bert]

To stay true the rules, maybe just cast and machine the insert?
The porosity is an issue, but in a slow cooling setup should reduce the potential???
more homework required. good excuse to get the furnace out again...

[Bert]

double post again... ?

[TZ350]

and stuff the laws of physics; whats the worst that could happen???

The laws of physics stuff you........................Interesting project, looking forward to seeing some pic's.........

[koba]

To stay true the rules, maybe just cast and machine the insert?
The porosity is an issue, but in a slow cooling setup should reduce the potential???
more homework required. good excuse to get the furnace out again...

Furnace aye...?

[jasonu]

[QUOTE=F5 Dave;1129772389]Be careful who you get to weld combustion chambers, older cheaper welders just seem to create porosity, something about not being sinusoidal wave, or maybe square, I forget, but the modern ones are the other type from older cheaper ones & have half a chance. The ally used is casting ally with a lot of zinc & it bubbles easily.

Sounds like an excuse for shitty prep and or welding to me. I have welded all sorts of ali castings and never had a fuck up that couldn't be used because I am totally cool!!!!

[Ivan]

No need for rubber mounting if you do a proper job and your engine isn't a 'shaker'. The motor in the pic is totally solid mounted, it runs smooth with no vib problem in the pegs or bars and has never broken or cracked the frame.

Whatis that bike? is it a TZ125????

[Bert]

Whatis that bike? is it a TZ125????

Can't keep up Ivan?
yes mate its now a TZR 99 ish.

I've been a bit of a copycat, very similar build to Busa Petes Yamagama.. (well actually nearly the same).

TZR125 (4DL Italian version) sleeved down to fit a mod'ed RG400 rear piston.
Bore 50, stroke 50.7

water cooled, reed valve..... what more can i say... except i hope it goes....

[Yow Ling]

If buying the insert wasn't out of the question (ie conflict with "perfomance parts rules, ?

No such rule, check the rule book , there is a rule about competition parts however.

[Bert]

haven't really entered into the grey zone (performance vs aftermarket vs competition) thus far, so why start now.
I find that most of the fun of buckets is the building the bloody things
(though of late that hasn't been that successful, though the old girl was getting, well, old; good service for 13 of its 15 years), I hope that the new one will last that long.

shitty photo but here we go...

http://www.kiwibiker.co.nz/forums/al...hmentid=209457

[jasonu]

Whatis that bike? is it a TZ125????

TZR50 frame with various other stuff attached.

[F5 Dave]

[QUOTE=jasonu;1129773859]

Be careful who you get to weld combustion chambers, older cheaper welders just seem to create porosity, something about not being sinusoidal wave, or maybe square, I forget, but the modern ones are the other type from older cheaper ones & have half a chance. The ally used is casting ally with a lot of zinc & it bubbles easily.

Sounds like an excuse for shitty prep and or welding to me. I have welded all sorts of ali castings and never had a fuck up that couldn't be used because I am totally cool!!!!

Shit you make me laugh mate. Pity you are too far away for more drinking sessions.