ring end gap
ring end gap
Dumb question time . . . . Brand new stock jug 89.0 bore, brand new stock cast piston, brand new standard rings . . . . wash the Honda honey off the bore, slip the rings in with the slug so they sit square, end gaps measure 19 and 20 thou. . . . . is this about right ? I know there was a formula that stipulated the end gap as a percentage of bore circumference, but I'm buggered if I can find it ! Just want to make sure this engine is as safe as possible. Any opinions ?
o.t.h.e.r . . . . .Over The Hill Enduro Rider
- Roostius_Maximus
- Site Admin
- Posts: 4641
- Joined: November 16th, 2007, 3:24 pm
- Location: Mt Nebo, Manitoba, Canada
- Contact:
I'd have looked for .018", go with the .019"
have you measured that cylinder to see that its skirt is proper size?
have you measured that cylinder to see that its skirt is proper size?
http://www.youtube.com/user/500bigbore
My CR500 Tech Reference... http://sdrv.ms/1a0CIiz
MRE Components... http://sdrv.ms/1bs2zhd
My CR500 Tech Reference... http://sdrv.ms/1a0CIiz
MRE Components... http://sdrv.ms/1bs2zhd
- iggys-amsoil
- Posts: 3602
- Joined: June 1st, 2007, 6:09 pm
- Location: Just North of March Airfield CA
This is one thing that piss' me off sometimes.
The end gap in the manuel says .018-.020 max. I think there is a minium of .014?
I have yet to see an end gap of less than .018 with a fresh bore and rings.
The end gap in the manuel says .018-.020 max. I think there is a minium of .014?
I have yet to see an end gap of less than .018 with a fresh bore and rings.
Trinity Racing mild porting FMF
62 pilot, EGH needle, 172 main
03 Gen III CR250 frame
2013 Dodger Charger 5.7 Hemi
http://www.prisonplanet.com
Your Amsoil Customer # 350882
62 pilot, EGH needle, 172 main
03 Gen III CR250 frame
2013 Dodger Charger 5.7 Hemi
http://www.prisonplanet.com
Your Amsoil Customer # 350882
Re: ring end gap
I know the formula for a forged piston is usually .004" for every inch of bore.. for cast i'd just use the same... can't hurt... i've took a kx125 engine apart for a customer that had a ring end gap of .020" and it ran fine.. lol thats no joke.other wrote:Dumb question time . . . . Brand new stock jug 89.0 bore, brand new stock cast piston, brand new standard rings . . . . wash the Honda honey off the bore, slip the rings in with the slug so they sit square, end gaps measure 19 and 20 thou. . . . . is this about right ? I know there was a formula that stipulated the end gap as a percentage of bore circumference, but I'm buggered if I can find it ! Just want to make sure this engine is as safe as possible. Any opinions ?
-
- Posts: 425
- Joined: July 31st, 2010, 5:22 am
- Location: Tillsonburg On