Search found 32 matches

by westeagle
Thu Sep 17, 2020 8:14 pm
Forum: Vintage (1948-1969) Motorcycles
Topic: Sluggish Acceleration R50 -SOLVED!
Replies: 12
Views: 805

Re: Sluggish Acceleration R50

MYSTERY SOLVED! Thanks to my friend and highly respected Airhead Guru -George Thomas of Air Support in Kitchener Ontario Canada, the problem of sluggish acceleration is solved! I sent George a video (wish I could do that on this new website,- would be a huge diagnostic tool for many people, but appa...
by westeagle
Mon Sep 14, 2020 6:26 pm
Forum: Vintage (1948-1969) Motorcycles
Topic: Sluggish Acceleration R50 -SOLVED!
Replies: 12
Views: 805

Re: Sluggish Acceleration R50

Kurt,

We were referring to piston ring end gap.
by westeagle
Mon Sep 14, 2020 6:25 pm
Forum: Vintage (1948-1969) Motorcycles
Topic: Sluggish Acceleration R50 -SOLVED!
Replies: 12
Views: 805

Re: Sluggish Acceleration R50

Thanks Waldoverkill
I will check again but I'm pretty sure choke isn't in...
by westeagle
Mon Sep 14, 2020 3:19 pm
Forum: Vintage (1948-1969) Motorcycles
Topic: Sluggish Acceleration R50 -SOLVED!
Replies: 12
Views: 805

Re: Sluggish Acceleration R50

I checked gas flow and timed it coming out of the float top into a 200ml receptacle. Both sides hit the 200ml by about 40 seconds in, so I can cross gas flow off. I dismantled, carb cleaned and cleaned out passages of both carbs: No difference in performance afterwards. Yes I did check valve clearan...
by westeagle
Sun Sep 13, 2020 5:10 pm
Forum: Vintage (1948-1969) Motorcycles
Topic: Air tubes for 1959 R60
Replies: 9
Views: 648

Re: Air tubes for 1959 R60

That seems high. I had my tubes beautifully rechromed both together for $40. I would shop around.
by westeagle
Sun Sep 13, 2020 5:05 pm
Forum: Vintage (1948-1969) Motorcycles
Topic: Sluggish Acceleration R50 -SOLVED!
Replies: 12
Views: 805

Sluggish Acceleration R50 -SOLVED!

After an absence from the 1957 R50 for a few months, I have changed out a leakey transmission seal and am back at trying to diagnose why the bike seems to hit a mid level RPM (maybe around 2500 rpm) and not want to increase much from there. (It used to run much better). Yesterday I did a static timi...
by westeagle
Tue Jun 23, 2020 10:33 pm
Forum: Vintage (1948-1969) Motorcycles
Topic: Believe I found the Smoking Gun for slipping clutch on R50! See Pics
Replies: 1
Views: 375

Believe I found the Smoking Gun for slipping clutch on R50! See Pics

I experienced a slipping clutch recently with oil on the lower "shelf" and was expecting the worst: Possibly a leaky main seal caused by Blow-by from too large a piston ring gap etc... First, I decided to remove the transmission and clutch for an inspection. Gladly, I was able to take off the transm...
by westeagle
Sun Jun 21, 2020 1:33 pm
Forum: Vintage (1948-1969) Motorcycles
Topic: Clutch Slipping on R50; Oil turns Black quickly; Piston ring gap -all related?
Replies: 11
Views: 786

Will try new rings then!

Im going to give it a shot. If the problem does end up being "blow-by", and the tighter ring gap stops the oil from going into the clutch via the main seal, I'm wondering if I still would need to open up the clutch and clean out the oil, or whether it would burn off? I will try the less invasive rou...
by westeagle
Sun Jun 21, 2020 1:00 pm
Forum: Vintage (1948-1969) Motorcycles
Topic: Clutch Slipping on R50; Oil turns Black quickly; Piston ring gap -all related?
Replies: 11
Views: 786

oops!

Ok then that was snowbum...

DO you think it would be safe to just replace those rings with new, tighter end gap ones without rehoning the cylinders at this point?

I have less than 50 miles on the bike with the new pistons.
by westeagle
Sun Jun 21, 2020 11:32 am
Forum: Vintage (1948-1969) Motorcycles
Topic: Clutch Slipping on R50; Oil turns Black quickly; Piston ring gap -all related?
Replies: 11
Views: 786

Oil type; black oil and ring gap

Thanks for your reply Kurt. I am using Lucas brand "Break In Oil" 20W50 containing ZDDP. I did change it out after the first 10 miles or so. From reading through past posts, I have heard that poor compression can create pressure in the case forcing oil out. I filed the piston ring end gaps to .5mm a...