Maintenance & Technical > KX500 Original

exhaust valves

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no sub for cubes:
just stripped my exhaust valve and cleaned,was about to reassemble and refering to the manual it states the left and right valve are diff...NOT on mine! :? they look identical to me,so next problem is i have no dots on the little cogs to realine them with the operating shaft groves...now im stuffed  :x
when reassembling in my manual it says put both valves in and then lift them slightly and push the operating shaft in..my next question is when this shaft is pushed all the way in i cannot see either of the groves on it for allignment,so if i had dots on each valve would you then have to bring the shaft back and then locate the first valve and then bring it back a bit more and locate the second valve?just asking because if its poss the valves are wrong then maybe poss this is wrong also.also what does everybody use to lubricate the exhaust valves?

                                              thanx guys

no sub for cubes:
ok just looked at a microfiche on the interent and both the exhaust valves are the same part no so they must be identical,i still have no dots on the little cogs must of warn away i guess :?

cbxracer30:
What year bike are we talking about No Subs

no sub for cubes:
the bikes an 88 cbx,and giving me a right headache to date  :x,bought it as a basket case but the motor was supposed to of been fully rebuilt,ive put it together,frame powder coated new bearings etc,had it running for all of 40mins and then showing symptons of crank seals blown  :cry:,not too gutted cos it had a bad oil leak from the sump plug and between the cases....pulled it apart found the gear mechanism(shaft) was damaged.new one of them...gear drum not look healthy ok new one of them...hair line crack in the sump plug hole and the retainer hole for the kick start spring was also cracked so i give me case to a guy to weld,takes him 2 weeks to do this lols and although he did a good job with the welding he made a crap job of retapping the sump plug.
 Now i wish id of just bought an inset kit and done it mysely but i gave it to another guy who then takes another week and tells me he doesnt have the insert to do the job  :?...so now i have given it to a well known bike shop which i should of done in the first place  :roll:,anyways today i decided i pull the exhaust valves apart and inspect them...opened up another can of worms lols.
when i pulled my barrel off discovered the piston and bore(bearing in mind this was supposed to be a completely rebuilt motor)are both damaged,now it could of happend since i got it running but close inspection shows sign of previous attempts with wet and dry to smooth out some of these marks,and my cylinders been sleeved :x...


                      GOD THAT FEELS GOOD TO HAVE A RANT  :-P

cbxracer30:
Ok its going to take you alot of messing with it ,but slide the exhaust valves about 3/4 way in then slide the operating shaft in and bolt it fast. The side with the extra idler gear will adjust easily without lifting the valve to adjust when the idler gear is not in , then the other you will have to lift it to adjust.start this the one without the idler and adjust it so it opens up the whole way when the shaft is out then set the other one so it looks 180 of the other one and reinsert the idler and check the operation. CBX

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