OzVMX Forum

Marque Remarks => Suzuki => Topic started by: suzuki 400 on October 25, 2012, 01:58:37 am

Title: rm465 piston gap
Post by: suzuki 400 on October 25, 2012, 01:58:37 am

hi im looking at a 465 cylinder that is 87.35 mm,i have a rocky piston at 1.5 over (87.5 mm i need to measure it ) my question, is that enough to do a rebore and what gap would i tell workshop for cylinder to piston gap  thanks Rod ......if anyone has another cylinder that might be better

Title: Re: rm465 piston gap
Post by: Lozza on October 25, 2012, 07:32:55 am

Should be written on the manual or on the box, but would imagine around 0.06-8mm on a slug that size

Title: Re: rm465 piston gap
Post by: lukeb1961 on October 27, 2012, 07:14:23 am

http://cid-407d7ef0965d3991.skydrive.live.com/browse.aspx/Racing%20Model
the owners manual for the RM465X

Cylinder
Decarbon the exhaust ports and the upper part of the cylinder.
Check the cylinder bore for wear by using a cylinder gauge at 20mm from the top surface.
Standard  86.000 - 86.015mm
Service Limit  86.060

Piston
Decarbon the piston crown and the ring grooves.
Minor scuff on the sliding surfaces can be removed by grinding with sandpaper #400.
Measure the piston diameter at the 27.5mm from the piston skirt end.
Standard 85.935-85.940mm
Service Limit 85.880mm

Piston Ring
Check  each ring for free end gap.
Standard  8.5mm
Service Limit 6.8mm
To check the piston ring for wear, fit the ring around the lower part of the cylinder and measure the end gap in this condition of the ring, as showen.
If the reading taken exceeds the limit, replace it by a new one.
Standard  0.30-0.50mm
Service Limit 0.85mm