Currently have Hepolite 4173 (86.4mm) but have been suffering with seizures (the bike, not me).
Done 100 miles so far. Bike always starts after a few minutes, not sure what my options are here?
There is 5 thou clearance top and bottom, the rings are free.
Piston for short stroke 1933 VH500
-
Simonpsmith
- Posts: 22
- Joined: Fri May 09, 2025 2:34 pm
- Location: Bedfordshire
- Contact:
-
Roger Gwynn
- Holder of a Golden Anorak
- Posts: 1984
- Joined: Tue May 28, 2013 11:34 am
- Location: Norwich, UK
- Contact:
Re: Piston for short stroke 1933 VH500
I would suggest honing the bore by half a thou, (.0005"). .005" is the bottom limit for clearance and I would aim for the median of .006". My VA used to seize if it was thrashed, took half a thou out and it has never misbehaved again, well not by seizing anyway.
Roger Gwynn, caretaker of the club's works drawings and machine register, membership secretary 2015-26. Director of AOMCC, Draganfly Motorcycles, Craven Equipment and Supreme Motorcycles mostly retired.
-
Simonpsmith
- Posts: 22
- Joined: Fri May 09, 2025 2:34 pm
- Location: Bedfordshire
- Contact:
Re: Piston for short stroke 1933 VH500
Thank you, Roger.Roger Gwynn wrote: Thu May 14, 2026 11:27 am I would suggest honing the bore by half a thou, (.0005"). .005" is the bottom limit for clearance and I would aim for the median of .006". My VA used to seize if it was thrashed, took half a thou out and it has never misbehaved again, well not by seizing anyway.
1933 VH500
Who is online
Users browsing this forum: No registered users and 0 guests