Are RD350 LC and RD350 AC pistons are same ?

trammway · 23rd July 2009, 19:35

I have got this set of Original NOS Yamaha ART piston kits shipped from overseas with the part number reading 4L0-11631-00.

I'm now confused as the part number search from google resulted that this Piston is a LC piston. Anyone got an idea if the same piston could be used in Air Cooled RD350 ?

alok_balsekar · 22nd August 2009, 04:33

Quote:

Originally Posted by trammway

Attachment 163447

I have got this set of Original NOS Yamaha ART piston kits shipped from overseas with the part number reading 4L0-11631-00.

I'm now confused as the part number search from google resulted that this Piston is a LC piston. Anyone got an idea if the same piston could be used in Air Cooled RD350 ?

LC Pistons are Taller than the Aircooled Ones .....

The Transfer port holes in the Piston are of a different shape too ...

yamdoot · 22nd August 2009, 22:30

both are the same.. LC pistons have larger ports which dont pose a problen for aircooled RD.. height is the same.. theres only a small tang at the skirt which has to be removed for use in aircooled RDs..

alok_balsekar · 23rd August 2009, 07:34

Quote:

Originally Posted by yamdoot

both are the same.. LC pistons have larger ports which dont pose a problen for aircooled RD.. height is the same.. theres only a small tang at the skirt which has to be removed for use in aircooled RDs..

When I got the Orig ARTs removed and was going to put in the "RD350 LC" stamped TKRs I saw the difference ... Got the RD350 ones for TKR ...same height as the ARTs ...

SunnyBoi · 23rd August 2009, 14:41

Pro-X Piston Modification

yamdoot · 23rd August 2009, 15:44

Quote:

Originally Posted by alok_balsekar

When I got the Orig ARTs removed and was going to put in the "RD350 LC" stamped TKRs I saw the difference ... Got the RD350 ones for TKR ...same height as the ARTs ...

its possible u got fake pistons.. hence the difference..

DeepakMenon · 2nd September 2009, 20:27

No Difference between a LC and a aircooled piston; the difference in the skirt is of a RZ piston

RZ pistons start with either : 31K; 29L; 2GU

4LO are LC (Non YPVS); most of the TKR pistons that you get in India are 4LO variety

I doubt your pistons are fake from what i see in the pic.. you have a good chance if you picked it up from ebay

23rd July 2009, 19:35	#1
trammway Senior - BHPian Join Date: Apr 2006 Location: Bridgewater USA Posts: 1,150 Thanked: 475 Times View My Garage	Are RD350 LC and RD350 AC pistons are same ? I have got this set of Original NOS Yamaha ART piston kits shipped from overseas with the part number reading 4L0-11631-00. I'm now confused as the part number search from google resulted that this Piston is a LC piston. Anyone got an idea if the same piston could be used in Air Cooled RD350 ?
	() Thanks

22nd August 2009, 22:30	#3
yamdoot BHPian Join Date: Aug 2005 Location: Indore/ Mumbai, Posts: 68 Thanked: 15 Times	both are the same.. LC pistons have larger ports which dont pose a problen for aircooled RD.. height is the same.. theres only a small tang at the skirt which has to be removed for use in aircooled RDs..
	() Thanks

23rd August 2009, 14:41	#5
SunnyBoi Senior - BHPian Join Date: Dec 2006 Location: Mysore / B'lore Posts: 1,663 Thanked: 4,099 Times	Pro-X Piston Modification
	() Thanks

2nd September 2009, 20:27	#7
DeepakMenon BHPian Join Date: Nov 2008 Location: Mumbai Posts: 278 Thanked: 180 Times	No Difference between a LC and a aircooled piston; the difference in the skirt is of a RZ piston RZ pistons start with either : 31K; 29L; 2GU 4LO are LC (Non YPVS); most of the TKR pistons that you get in India are 4LO variety I doubt your pistons are fake from what i see in the pic.. you have a good chance if you picked it up from ebay
	() Thanks