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Search found 6 matches

by rsolin
Tue Jun 21, 2022 2:17 pm
Forum: Vintage (1948-1969) Motorcycles
Topic: R69S hesitation, crackling sound, uneven power at 40mph
Replies: 6
Views: 1436

Re: R69S hesitation, crackling sound, uneven power at 40mph

Circling back after leaning out mixture (adjusting needle jet height), it now runs great. After all the remediations, this was the "last" one to make it run great again. :D
by rsolin
Fri Apr 22, 2022 1:30 pm
Forum: Vintage (1948-1969) Motorcycles
Topic: R69S hesitation, crackling sound, uneven power at 40mph
Replies: 6
Views: 1436

Re: R69S hesitation, crackling sound, uneven power at 40mph

Hey Mal,.

Thank you! Yes, it's running rich (on purpose, as I was breaking in new top end). Needles and jets are new and should be correct for R69S. I will adjust needles and see if that does the trick.

Again, thank you!

Best
Roger
by rsolin
Thu Apr 21, 2022 12:08 pm
Forum: Vintage (1948-1969) Motorcycles
Topic: R69S hesitation, crackling sound, uneven power at 40mph
Replies: 6
Views: 1436

Re: R69S hesitation, crackling sound, uneven power at 40mph

Thanks, Dave. The pushrods are confirmed straight. Valves, related are no longer an issue.
by rsolin
Wed Apr 20, 2022 7:42 pm
Forum: Vintage (1948-1969) Motorcycles
Topic: R69S hesitation, crackling sound, uneven power at 40mph
Replies: 6
Views: 1436

R69S hesitation, crackling sound, uneven power at 40mph

Hi All, This is a weird one that I'm hoping someone can help with...please. My '68 R69S exhibits a hesitation, crackling sound (almost like a leak in exhaust) and non-smooth power transition at about 40 mph. When i get above about 50 mph it "goes away", or quite possibly it's being covered...
by rsolin
Mon Nov 22, 2021 4:20 pm
Forum: Vintage (1948-1969) Motorcycles
Topic: What to look for when inspecting valve ass'bly on R69s?
Replies: 0
Views: 1960

What to look for when inspecting valve ass'bly on R69s?

Hi all, Aside from checking valve clearance (normal maintenance), doing a leak down test, carbon build-up, valve and valve seat pitting, valve guide play, vertical play on rocker arms (to reduce valve noise), flat (straight) pushrods with unworn ends, what else should one inspect upon disassembly wh...
by rsolin
Mon Jul 16, 2018 7:10 pm
Forum: Vintage (1948-1969) Motorcycles
Topic: Right cylinder ping?
Replies: 4
Views: 1203

Figure out the ping?

Hi Twocams,

Did you figure out the right-side only ping on your R69S yet? Pls do LMK as i'm experiencing same (timing is also spot-on and the slingers were done recently). I've run a couple tankfuls of Techron to attempt to burn off excessive carbon, but it's still an issue.

Thanks!
roger