RM370 Piston

[Toolboy]

Gday all,

Can you use a RM400 piston in the 370 barrel??

Thanks

Tim

[LWC82PE]

Rick Horvat in USA has Wiseco RM370 pistons specially made. Well he may not have any left im not sure but just ask him. You may also find his details in an older VMX mag.
[email protected]

[lukeb1961]

the RM370 was 77mm*80mm and the RM400 was 80mm bore * 80mm stroke.

[VMX247]

Gday all,
Can you use a RM400 piston in the 370 barrel??
Thanks
Tim

Yes they can
cheers Zook Doc

[JohnnyO]

Yes you can bore the 370 cylinder out and use the '78 400 piston.

[Toolboy]

What is the difference between a 78 400 piston and a 79/80 Piston???

Is it just the single ring?

Thanks
Tim

[VMX247]

   from your professional Suzuki Doc -  all the RM400's C/N/T use the same piston, it's only the stroke that differs. 400C=402cc 400N/T=417cc 

For clarification, it's only the RM370 that used double ring..all the 400's are the same piston which are single ring.
cheers A & DR
 
 

[Toolboy]

Ok...thanks for the info..so is there a .75 piston for the 370 or is it easier to get a STD 400 piston??

Cheers

Tim

[VMX247]

ebay item numbers

220235250144 (RM370 0.75 piston)
190211579004 (RM370 0.75 piston rings)

Search 'RM370 piston' or '12110-41202-075' or '12110-41202' and look for the 0.75 size option.
or
Search 'RM400 piston' and look for the std size.
or
simply google search !!
cheers from your local Suzuki Doc. 

[Toolboy]

Hey Doc,

Thanks for the great info...

You wouldnt also now about sourcing a muffler for the 370???

Cheers

Tim

[oldfart]

MCS  have a universal type that  look OK

[Toolboy]

Who is MCS??...do you have a link for their web site??

Thanks

Tim

[BEARVMX]

Gidday same gudgeon pin as rm 400 c/n/t you must use rm370 s/end bearing though, ive just rebored a rm370 cyclinder it fits the rm400 std piston without any problems Bear

[VMX247]

........RM370 top bearing advice.I believe it's only the N and T models that have a different bearing due to slightly smaller dimensions, the 400C bearing is the exact same part as the RM370. #09263-18011.   
 Out of interest the 400C barrel also bolts straight onto the 370's. 
cheers Zook Nuts

[Toolboy]

VMX... thanks for the info..

I was wondering about the 400c barrel bolting onto the 370.
Do you know if this is the std coversion to the 370 for racing???

Thanks

Tim