V7 Left Cylinder Knocking Sound

[Parashootist]

Well the motor I planned to buy has sold. I guess one of these days I'll pop that cylinder off and see what's going on.

[guzzisteve]

Keep riding it, noise may go away. If you don't you wont know, may just be OK.  Compare it with another before you do anything drastic.

[John A]

I know it’s a different kettle of fish but as an example my 99 Bassa had a noisy right cylinder. I found the problem after around 50 K miles when I had the engine apart for some hot rod work. As I looked in the engine it was upside down on the bench with the cylinders on. The skirt of the right cylinder was just touching the back of the timing chest. I could see where it was slightly rubbing and made a mark. I think as the temp changed it would ring a little bit. I gave it some clearance with a bur , didn’t take much. That noise is gone now. I think when they went to a larger bore, the right cylinder lower edge is very close to the timing chest . It’s something to look for when you have a big block apart.

[Dirk_S]

I wonder…

Both Parashootist’s and my former bike’s one cylinder is loud. Both bikes have less than 5,000 miles on their top end, right? Could perhaps cylinder heads that aren’t properly torqued down EVENLY cause a louder ping, without necessarily causing compression loss?

I told the new owner that I would show them how to do valve adjustment. Maybe I should consider retorquing the heads down once more?

[Frenchfrog]

I had a weird little noise , more of a rattle ,on my original NTx engine which never got worse ....and then it threw a rod on a longish trip.Crank and rod out of action so got another engine but the lesson I ignored was to not do anything and have a butchers.Would have saved an engine, quite a bit of cash and also the hassle .

[Parashootist]

I had a weird little noise , more of a rattle ,on my original NTx engine which never got worse ....and then it threw a rod on a longish trip.Crank and rod out of action so got another engine but the lesson I ignored was to not do anything and have a butchers.Would have saved an engine, quite a bit of cash and also the hassle .

When this happened, did the rear wheel lock up? That is my concern.

I just don't know what else non magnetic metal in the oil could be besides bearings...

[Frenchfrog]

No ...that time there was no locking up on that occasion.But on my T3  I had a rebuilt UJ go south on the motorway outside London. The UJ had been in there for a few thousand miles but chose the most inopportune moment to start breaking up in the fastest lane on a 3 lane section. I did manage to pull right over and stop in a patrol station thankfully as the rollers were just getting broken one by one as they fed out of their housing .I'll never use a rebuilt UJ again.

[MattP]

take the left cilender off all ready, cost nothing then you will probly have your answer  90% chance you can reuse the gaskets, got it off yet?

[Parashootist]

take the left cilender off all ready, cost nothing then you will probly have your answer  90% chance you can reuse the gaskets, got it off yet?

I'll get to it soon, too many projects going on right now. Working on a Gl1000, Vfr750F, RM85, and GT550 simultaneously