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- Apr 6, 2013
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Curious to know if anyone else has JCC pistons with round wire clips instead of the snap ring eyelet clips?
if the pistons are in the wrong cylinders, with the valve cut outs in the wrong place-then yes the valve will kiss the piston and make is own indentation!Yes, that funny depression just toward center of the valve pocket looks like it isn't standard.
Curious to know if anyone else has JCC pistons with round wire clips instead of the snap ring eyelet clips?
I see it SOOOOO often, people not checking their own work as they proceed. “Proofreading” MATTERS!Surely who ever done the work would have made sure they had the right piston for where the valves are for the valve pockets, he must have forgotten to put his eyes on (glasses), I be pulling that motor down to make sure anything else hasn't been done wrong with it, must have been a reason why pistons had been removed in the first place, there are so many dishonest people around who lie about things when selling bikes or car for that matter, in the long run pulling that motor completely down might be cheaper than having something else go wrong with it.
Ashley
I'd think Jim Comstock (comnoz) would know.
(JCC replacement pistons for other makes of motorcycle can have wire circlips so this is specifically about JCC Norton Commando pistons)
I think the new JCC all come with snap ring eyelet clips. The pistons on my bike are at least 10 years old.
Whose coatings did you use?
Surely who ever done the work would have made sure they had the right piston for where the valves are for the valve pockets, he must have forgotten to put his eyes on (glasses), I be pulling that motor down to make sure anything else hasn't been done wrong with it, must have been a reason why pistons had been removed in the first place, there are so many dishonest people around who lie about things when selling bikes or car for that matter, in the long run pulling that motor completely down might be cheaper than having something else go wrong with it.
Ashley
Pistons in wrong and intake valves touching the tops of the pistons.I bought this '71 remotely, sight unseen a few years ago. Supposedly it had an original 4000 miles, after speaking to the original owner on the original '71 Texas title who said engine never been apart! Ha.
After its second club ride last weekend, we noticed a lot of smoke out the right hand exhaust when heavily on the throttle, and a leaky head gasket.
Here is what we found upon taking the head off.
Anyone notice anything amiss?
View attachment 8837
Curious to know if anyone else has JCC pistons with round wire clips instead of the snap ring eyelet clips?
Curious to know if anyone else has JCC pistons with round wire clips instead of the snap ring eyelet clips?
I bought this '71 remotely, sight unseen a few years ago. Supposedly it had an original 4000 miles, after speaking to the original owner on the original '71 Texas title who said engine never been apart! Ha.
After its second club ride last weekend, we noticed a lot of smoke out the right hand exhaust when heavily on the throttle, and a leaky head gasket.
Here is what we found upon taking the head off.
Anyone notice anything amiss?
View attachment 8837
Even mismarked, pretty hard to believe anyone could ignore the splayed exhausts and parallel intakes.
True but...
I once had a Trident engine assembled by a professional engine builder who was also a friend.
I went round to his workshop to check on progress and he was just about to fit the head, I got there just in the nick of time to spot that one piston was back to front... the other two were correct... how could he possibly not have seen that?!
A bit like your builder who put your TSS conrods in the wrong way around with the little end offsets pointing the wrong way...lol.
Been quite a while since I had the head off a triple. Aren't the valve pockets symmetrical, i.e. parallel to the wheels?True but...
I once had a Trident engine assembled by a professional engine builder who was also a friend.
I went round to his workshop to check on progress and he was just about to fit the head, I got there just in the nick of time to spot that one piston was back to front... the other two were correct... how could he possibly not have seen that?!