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Re: 79 Kawasaki KZ650 - Engine Stripped down ready for Vapor Blasting
Need help: Remeasured the bored with a different tool. Initial measurements were off. Someone bored out my head to fit 65mm pistons. I broke a piston and it looks like they don't make the 65mm pistons anymore. What are my options? 79 KZ650
EBay a new head?
Put new sleeves in?
Put 64mm pistons in?
Need help: Remeasured the bored with a different tool. Initial measurements were off. Someone bored out my head to fit 65mm pistons. I broke a piston and it looks like they don't make the 65mm pistons anymore. What are my options? 79 KZ650
EBay a new head?
Put new sleeves in?
Put 64mm pistons in?
20 - 252 .350 - Modified engines up to 82 3000RPM+ stock springs and cups
25 - 260 .360 - 82 & Later Stock springs OK piston clearance needs checking more power from 3000RPM
30 - 270 .370 Best cam for big cc street motor. Springs, cups and collars sould be upgraded. Power comes on from 3000RPM+
35 - 274 .380 - Street/drags 800cc and up. Fully modified engines rurn on from 5000RPM up. Springs, cups, collars should be upgraded
40 - 262 .392 - Drags and big motors. Springs and cups required. Broad torque to 11000RPM
I have the 10 and 15 cam sets. Your 20s are the largest recommended for stock pistons.
The 25 and up cams require notched pistons. You should still check your clearances thou.
The 20s might be a little racey with little power down low. As for pistons, rings for standard
size 650s will be hard to find. A Wiseco piston kit is a viable alternative.
Top of piston is always way smaller than the skirt because top of piston will expand a lot when it gets up to operating temperature (probably 350f+?)
I've only used one Martek 440, didn't like it as it failed 250 miles from home.
Initially bike would idle but dropped 2 cylinders when warmed up so I rode 230+ miles on 2cyl. Never had any luck with warranty so decided I didn't like them (this was around 1980)
Can anyone tell me how to identify the Andrwes cams? I bought a bike that has a set(so im told) in it and i would love to know what i got. The only casting on them is a R2 and an L i think on the exhaust.... Again these are cast numbers , nothing is stamped.
Also what you degree the cams on these fine beasts, Do you degre to the notch in the camshaft is lined up to the top of the cyl head? All my marks are just a tad off and i'm sure between cyc head decking and chain wear this is responsible.
Can anyone tell me how to identify the Andrwes cams? I bought a bike that has a set(so im told) in it and i would love to know what i got. The only casting on them is a R2 and an L i think on the exhaust.... Again these are cast numbers , nothing is stamped.
Also what you degree the cams on these fine beasts, Do you degre to the notch in the camshaft is lined up to the top of the cyl head? All my marks are just a tad off and i'm sure between cyc head decking and chain wear this is responsible.
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