What piston size? - Motorcycle-Journal Forums

richep · 07-31-2005, 07:59 PM

I have a 98 RM 125 and need a new piston. How do I no what size to get? Dennis Kirk has a choice of 53.94mm, 53.95mm, 53.96mm, 53.97mm. How do I know which one. Mike the piston or cylinder? Thanks.

Dave2122 · 08-01-2005, 12:11 AM

Listen you have a Nikasil Cylinder and unless it is damaged all you need is the standard size piston. I recommend you use the OEM Suzuki stock piston and rings. that way you do not risk getting the wrong size.

Side note....

Replace the wrist pin and needle bearing and c clips when doing a top end.

richep · 08-01-2005, 04:55 AM

I realize I need standard bore. But which one is standard bore? In the past, this was a no brainer.

InaneCathode · 08-02-2005, 01:34 AM

whoaaaa
What happened to the old one?
If it damaged at all the cylinder, you'll have to get it bored out, and get a bigger piston also...

richep · 08-02-2005, 04:59 AM

I thought you couldn't bore these. (nikasil)

Dave2122 · 08-07-2005, 10:10 PM

You can not bore the cylinder. If it is damaged it will need replating.

www.mt-llc.com go on that site and read about it. They do all my cylinder work.

richep · 08-08-2005, 04:55 AM

Put a std. Suzuki piston in and it runs of compression.s great. No slap and lot

07-31-2005, 07:59 PM	#1 (permalink)
richep Newbie Joined: Jul 2005 Posts: 21	What piston size? I have a 98 RM 125 and need a new piston. How do I no what size to get? Dennis Kirk has a choice of 53.94mm, 53.95mm, 53.96mm, 53.97mm. How do I know which one. Mike the piston or cylinder? Thanks.

08-02-2005, 01:34 AM	#4 (permalink)
InaneCathode Seat Tester Joined: Jun 2005 Bike: '81 XT250,Yamaha '72 LT2100, '79 Suzuki TS-185 Location: Colorado Posts: 78	whoaaaa What happened to the old one? If it damaged at all the cylinder, you'll have to get it bored out, and get a bigger piston also... __________________ Steve: "You call this a vacation!?" Dr. Weird: "No! I call this... TACO ISLAND!"

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08-01-2005, 12:11 AM	#2 (permalink)
Dave2122 Sprocket Pilot Joined: Sep 2004 Bike: Which one of the 9? Location: USA Posts: 887	Listen you have a Nikasil Cylinder and unless it is damaged all you need is the standard size piston. I recommend you use the OEM Suzuki stock piston and rings. that way you do not risk getting the wrong size. Side note.... Replace the wrist pin and needle bearing and c clips when doing a top end.

08-01-2005, 04:55 AM	#3 (permalink)
richep Newbie Joined: Jul 2005 Posts: 21	I realize I need standard bore. But which one is standard bore? In the past, this was a no brainer.

08-02-2005, 04:59 AM	#5 (permalink)
richep Newbie Joined: Jul 2005 Posts: 21	I thought you couldn't bore these. (nikasil)

08-07-2005, 10:10 PM	#6 (permalink)
Dave2122 Sprocket Pilot Joined: Sep 2004 Bike: Which one of the 9? Location: USA Posts: 887	You can not bore the cylinder. If it is damaged it will need replating. www.mt-llc.com go on that site and read about it. They do all my cylinder work.

08-08-2005, 04:55 AM	#7 (permalink)
richep Newbie Joined: Jul 2005 Posts: 21	Put a std. Suzuki piston in and it runs of compression.s great. No slap and lot

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