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  1. Aussie

    help with piston ring numbers

    My piston rings have 75 stamped on them as do the tops of the pistons. Correct me if I am wrong but the 75 on piston would to me indicate the size is 75mm and the 75 on the ring would be the same, or would it. As I have bought STD 75 piston rings from Japan ( part# 447-11610-00 ) and the end gap...
  2. Aussie

    Technical help needed

    Hi Guy's, here's one for you. Recently bought an xs840 Halco. Liners bad so go for re-bore. Managed to get a pair of 87.25 pistons, gave them and barrels to an engineering expert (apparently) to re-bore the liners. He has just thrown a question at me which has me stumped. He needs to know - if...
  3. Aussie

    Locking up

    Took my xs650 to a show on weekend and won best custom and best in show,:D bike ran great :bike:. Come to go out today, started fine, shifted in to first moved about 2 foot and bike locked up solid :eek:( forward and backward ), shifted to neutral then back into fist and rode off, no probs...
  4. Aussie

    Need help here

    Hi there, recently bought an xs650 bobber and after searching have found out my engine is a 1972 and my carbs are '76 - '79. Question is it dies on idle so should I re-jet as for a '72 (45 pilot) or just find new carbs of that year. At present I have 27.5 pilot and 155 mains. Am going to try a...
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