wsuwrhr
Purveyor of the Biggest Brapp
- Location
- Alta Loma, working in Upland
Billet Kawi Porn
- Thread starter wsuwrhr
- Start date
madscientist
chilling with these guys.
- Location
- good old p'cola
i was just stating it is never 2- square.
i agree on the 84 x 94, sick power. build that in a twin .
i agree on the 84 x 94, sick power. build that in a twin .
wsuwrhr
Purveyor of the Biggest Brapp
- Location
- Alta Loma, working in Upland
Just to be clear on what you are saying now is:
You are comparing an OHV 4 stroke pancake-engine design to a 2 stroke inline case-reed-valve engine?
Cereal?
Brian
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madscientist
chilling with these guys.
- Location
- good old p'cola
no just half of it. too much vibration?
wsuwrhr
Purveyor of the Biggest Brapp
- Location
- Alta Loma, working in Upland
Unfortunately it is "comparing apples to oranges".
More like a completely different engine design.
- Location
- South Africa
As far as I remember for good performance you want to be in the 1.0-1.2 range on bore/stroke ratio, so at 1.2 and 90mm you need a 75mm stroke
waxhead
wannabe backflipper
- Location
- gold coast
Any high performance two stroke other than jetskis seems to favour the square design
What are the limiting factors in the stroke on a Kawi. On the Yamaha twins it used to be 5mm, 6mm, 8mm and now years later we are hearing 10mm,12mm, 16mm ect.. Is it possable to skip a few years worth of waiting and go right to the big chit or is there not room in the OEM cases for this kind of stroke, or is it a demand for a differant rod, ect ect.
wsuwrhr
Purveyor of the Biggest Brapp
- Location
- Alta Loma, working in Upland
The Kawi stock case will only accept a +4MM stroke.
A stock filled Yami case will only accept a +12MM(80 MM), but that is pretty far out there.
You are able to skip years worth of waiting and buy a billet Yami case right now. You can run whatever stroke you want, right now the biggest crank we have put in it is a 16MM. At this time I make a GP case for 8-10-12MM and 16MM strokes.
As far as a Kawi goes, more interest needs to be generated, or people need to step up with orders, to warrant the expense to build it. It will happen.
Crankworks is now building their own rods, so there are no more limitations as far as that goes.
We are pretty much full steam ahead.
Brian
A stock filled Yami case will only accept a +12MM(80 MM), but that is pretty far out there.
You are able to skip years worth of waiting and buy a billet Yami case right now. You can run whatever stroke you want, right now the biggest crank we have put in it is a 16MM. At this time I make a GP case for 8-10-12MM and 16MM strokes.
As far as a Kawi goes, more interest needs to be generated, or people need to step up with orders, to warrant the expense to build it. It will happen.
Crankworks is now building their own rods, so there are no more limitations as far as that goes.
We are pretty much full steam ahead.
Brian
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dbrutherford
Parts Whore
- Location
- Fairmont, WV
You guys are going to build steam engines?
- Location
- South Africa
With 84mm stroke(+16mm yami), I guessing peak hp at 6500rpm as at about 7240rpm you go through the 4000ft/min and engine life decreases rapidly
wsuwrhr
Purveyor of the Biggest Brapp
- Location
- Alta Loma, working in Upland
Steam?
Sure, you want to buy one?
edit...haha..I got it....Full steam ahead.
It's hot out. I'm a little slow today.
Brian
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Wondering the same thing . Not about steam engines though.:Thinkingof_:
the WaTeRhAwK
fryin' up a/m electrics..
- Location
- okc
wsuwrhr
Purveyor of the Biggest Brapp
- Location
- Alta Loma, working in Upland
dbrutherford
Parts Whore
- Location
- Fairmont, WV
Here is a broken head pipe. Looks like the one I saw in person. Not sure if we were talking about this on this thread or the billet yamaha cases thread.
http://cgi.ebay.com/ebaymotors/Fact...30378683470QQptZPersonalQ5fWatercraftQ5fParts
http://cgi.ebay.com/ebaymotors/Fact...30378683470QQptZPersonalQ5fWatercraftQ5fParts
wsuwrhr
Purveyor of the Biggest Brapp
- Location
- Alta Loma, working in Upland
DB,
Thanks for the heads up, I am not sure where it was being discussed, but it has been brought up a few of times.
That pipe you put the link up for has nothing to do with what we are talking about, which is the head pipe "supposedly" breaking due to the mod being done to the Factory B pipe to clear the DASA PV's.
Not to mention, it is an SXR Kawi pipe, not a Yami pipe.
Most anything will fail due to lack of maintainance.
Brian
Thanks for the heads up, I am not sure where it was being discussed, but it has been brought up a few of times.
That pipe you put the link up for has nothing to do with what we are talking about, which is the head pipe "supposedly" breaking due to the mod being done to the Factory B pipe to clear the DASA PV's.
Not to mention, it is an SXR Kawi pipe, not a Yami pipe.
Most anything will fail due to lack of maintainance.
Brian
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dbrutherford
Parts Whore
- Location
- Fairmont, WV
I know. I would say these break because they got loose and vibrated. But it makes the second or third pipe I have seen break. That is all I was saying before.
I have seen head pipes modified for use with gas valves. I just wish someoen would cast a new head pipe that overcomes having to cut and weld on them.
I have seen head pipes modified for use with gas valves. I just wish someoen would cast a new head pipe that overcomes having to cut and weld on them.
wsuwrhr
Purveyor of the Biggest Brapp
- Location
- Alta Loma, working in Upland
I would agree that is exactly what happened. Regardless, anything neglected won't last and will fail.
Not enough money in pipes anymore to recouperate the cost of tooling.
Don't be scared of a a little choppy-choppy.
Brian
Not enough money in pipes anymore to recouperate the cost of tooling.
Don't be scared of a a little choppy-choppy.
Brian
the WaTeRhAwK
fryin' up a/m electrics..
- Location
- okc
why not? it seems to be working for dirtbike motors.
they don't even use sleeves anymore, they just plate the aluminum bore.