I should add, it looks like you got a little pinging there.

 

Long story short I bought the bike a few years ago and was told “it has cams”. ran it for about a year and a half and it started to smoke for whatever reason so I had it rebuilt (complete top end with heads) during the rebuild the shop owner told me “it has a 103” kit on it and it’s has the sh*t beat out of it”. He did whatever he did, poorly apparently, and now 3-4k miles and a bent valve and marred retainer later, I’m back at a rebuild again. I would assume he was thinking of a TC 96 which with the same big bore kit would be “103in kit” IIRC.

 

Would that be the “rattle” for lack of a better term, that I hear from a heavy roll on from low rpm (1800-2000)? I’ve been chasing it since the rebuild and haven’t found it. I honestly thought it was a floating valve.

 

With the motor build, you'll need to back off on the timing. HD used to sell, -5 and -10 degree ignitions. Not sure if you have one but your best bet is to go to a Daytona Twin Tech if running carb. If running EFI, others might be able to help here.

http://www.daytona-twintec.com/TC88.html

 

And quit burying the throttle at 1800 rpm...

Not to scare you but the last time my engine had a bunch of noise coming out the breather and extra pressure in the oil bag was after I blew it up. The compression chamber pressure from the combustion stroke was going around the rings and compressing the crankcase and blowing lots of oil out the vents.

 

I don’t, rarely happens because of the noise that I didn’t like. It’s more of a 5th gear pull to pass someone rather than “burying”

 

So I pulled the cylinder and can still see the honing marks, piston looks ok. The black is worn off the rear side of the piston. I eyeballed the ring gap, I can’t find my gauge so I’ll have to pick one up tomorrow. I used a dime just to get perspective.

 

Now that I see your motor is unpainted, seen some new take off jugs on eBay to match.

 

I’ve got a buddy that has some jugs, he is going to go through them and see if he has a matching set. I’m going to go ahead and start over and rebore with all new stuff. Now seems to be the time to go gear drive I suppose while I’m at it.

 

I have couple pair that never been bored but there painted. Outside finish so so. That's why I like the new take off then the motor looks like new.