dorkingyam
XS650 Member
What are the best new conrods commonly available, and where can I get them please?
Cheers
Mark (UK)
Cheers
Mark (UK)
-
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Best conrods
- Thread starter dorkingyam
- Start date
Those 2 criteria are somewhat mutually exclusive.
Which is more important to you?
And, which type, what length conrods?
256 … 136mm rods … XS1-TX650, 22mm wristpin, 26mm crankpin
447 … 130mm rods … TX650A-on, 20mm wristpin, 26mm crankpin
533 … 140mm rods … XS650B euro models, 20mm wristpin, 29mm crankpin
(Longrod) CR-500 or KX-500
Because the strokes are the same each rod type has its own pistons...
If you have 553 rods probably your best bet is Heiden tuning or Twins Inn.
For 447 and 256 I would buy from 650 Central or Gary Hoos or the first two. It will probably come down to shipping and VAT for you.
All the 447 rods I have seen have the number cast / forged on them.
https://www.heidentuning.com/
http://www.twins-inn.com/epages/78210236.sf/en_GB/?ObjectPath=/Shops/78210236/Categories
http://650central.com/
http://www.hoosracing.com/650750pricelist.html
The cranks in these old dears are pretty robust, I have seen them described as bullet proof, bomb proof but not boy proof.
For normal use and racing standard rods are fine, if you want you could get them shot peened but I don't think its required for normal use or 750cc kits.
For 447 and 256 I would buy from 650 Central or Gary Hoos or the first two. It will probably come down to shipping and VAT for you.
All the 447 rods I have seen have the number cast / forged on them.
https://www.heidentuning.com/
http://www.twins-inn.com/epages/78210236.sf/en_GB/?ObjectPath=/Shops/78210236/Categories
http://650central.com/
http://www.hoosracing.com/650750pricelist.html
The cranks in these old dears are pretty robust, I have seen them described as bullet proof, bomb proof but not boy proof.
For normal use and racing standard rods are fine, if you want you could get them shot peened but I don't think its required for normal use or 750cc kits.
Michael Morse of 650 Central recommends the "heavy duty" rod kits from Mike's XS for hopped up 447 motors (the rods themselves are the same as the standard version but with heavier bearings). I've used them for quite a few years--good equipment, Japanese made, decent price, might be the same stuff Heiden sells. If you want to spend a little more, Wiseco Hot Rods are an option. If you want to spend a lot more, there's Carillo, Falicon, and whoever makes high end racing components on your side of the water. Whatever you use, have the crank welded; flywheels have a nasty tendency to separate in hopped up motors or in any motor after reassembly. If you want to minimize vibration, have the rods and pistons beam balanced before assembly and have the crank trued as close as possible to zero detectable runout at the journals.
