The highest point on the CT90 piston is 1.00mm lower, but the piston edge where the compression dome starts is actually 0.5mm higher according to TKRJ. Spacer might be to stop the outside edge of the piston compression dome contacting the cylinder head at the edge of the combustion chamber. However, I wouldn't have thought that these pistons were an option because it'd give you a total displacement of 161cc.
CT 90: http://www.tkrj.co.jp/goods/m-AH0350X--028-070.php
CB125T http://www.tkrj.co.jp/goods/m-AH0670X--399-010.php
Might be C70 pistons though, which are basically a +3.00mm from the CB125T pistons. These would give you 142cc. Possibly still need the spacer due to the increased width of piston vs cylinder head combustion chamber. These are also probably as big as you can go without changing the original cylinder liners.
C70: http://www.tkrj.co.jp/goods/m-AH0210X--087-712.php
Hilleye
If it doesn't bring a tear to your eye, add a little more fully synth 2T to the mix.
Disagree...You'd use C90E pistons which have a lower deck height than the CB125T ones - and are 47mm bore.
Once you'd cut the barrel to get correct deck height, you'd machine the piston crowns for squish shape to match the head.
i suspect that the earlier reference to CT90 pistons should have been C90...
BTW the C90 and CB125 both use 13mm pins where the CT90 uses 14mm...
But again, this just points up that the engine in question must use something very different....
My moneys on Pit bike pistons.
http://dratv.com/encoon.html
Far greater choice of dome shapes,
he could also have used earlier Honda twin pistons.
http://thumbs1.ebaystatic.com/d/l225...NkTNstdUng.jpg
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Kinky is using a feather. Perverted is using the whole chicken
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Kinky is using a feather. Perverted is using the whole chicken
yea i could be interested if the price is right
Just putting this out there, a mate in Holland is selling his 50 in parts and has a very nice NX4 front end (no Wheel but brake is there) whats it worth bearing in mind you still have to pay shipping ( although I am buying a few bits and bobs so we could come to a joint arrangement)
to honest I have no idea, he just asked me if I would be interested, he has a NSR50 engined bike from the old Dutch series, bike minus wheels, the frame is home built out of bits and bobs but it has that front end NX4 rs125 fork, titanium brembo caliper, honda master cylinder,
You boys would have an idea of worth, I've tried finding some on ebay but nothing found
we have picked up most of are ones for 400-500 hunderd , if you just willy nily buy some you will pay up around 1000 dollars , clamps are 170-300 but we have are own , ashame to break the bike up by the looks
i'm over buckets
Wheels for Sale:
From an FZR 250, these are lighter than most road rims in the same size.
Rear - 3.5" Has a Disc, no cush drive and is missing 2 of the cush rubbers.
Front - 2.75" - Bare, has a dent in it - I'll let this go for bugger all, a few good hammer hits might bring it back but this is at your own risk.
I'll be selling another front soon, I just need to work out which of the two fits on my bike better, they are slightly different.
Offers.
Heinz Varieties
http://www.trademe.co.nz/motors/moto...1036428563.htm
Looks like a good start, I'm sure someone was asking for one up those ways
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