Spark Plugs For 2007 Suzuki RM 125

Skeeter Hounes
I recently got a 2007 RM 125 off Craigslist. I went to the local dealer to get spark plugs and they said they were $35 a piece! There on Rocky Mountain ATV for $28 and Dennis Kirk for $27. Does any one know of a cheaper alternative? They are NGK Resistor Sparkplug R6918B-8 Any input would be great. Thanks guys.
|
BAMX
Profile picture for user BAMX
Posts
2896
Joined
1/22/2012
Location
Fallbrook, CA, USA
BAMX 6/8/2016 5:40pm
6/8/2016 5:40pm
I just sold my RM125 and have a couple of the R6918B-9 for sale on Ebay $29.99 for 2 w free shipping. Otherwise, rockauto.com has had the best prices.
Skeeter Hounes 6/8/2016 8:37pm
6/8/2016 8:37pm
What's the difference between the R6918B-8 and the R6918B-9?
adam8781
Profile picture for user adam8781
Posts
671
Joined
12/22/2015
Location
CA
adam8781 6/8/2016 10:34pm
6/8/2016 10:34pm
br8es/eg works just fine but you always run the risk of the the electrode braking off into the motor. i dont know why suzuki demands these pricey plugs but anything but the pricey ones had the tendency to rattle apart and drop into the motor.

The Shop

See All »
BAMX
Profile picture for user BAMX
Posts
2896
Joined
1/22/2012
Location
Fallbrook, CA, USA
BAMX 6/9/2016 10:57am
6/9/2016 10:57am
adam8781 wrote:
br8es/eg works just fine but you always run the risk of the the electrode braking off into the motor. i dont know why suzuki demands these...
br8es/eg works just fine but you always run the risk of the the electrode braking off into the motor. i dont know why suzuki demands these pricey plugs but anything but the pricey ones had the tendency to rattle apart and drop into the motor.
I don't have any experience with an 07. Mine was an 02 and it had some detonation issues. I sent the head to Varner and he reshaped the dome and set the squish to help. He told me to run 96 plus for octane and the expensive plug. The opinion that he gave me was that those engines needed the extra octane and the good plug. There are more than a few people who have broken electrodes in RM's.
BAMX
Profile picture for user BAMX
Posts
2896
Joined
1/22/2012
Location
Fallbrook, CA, USA
BAMX 6/9/2016 10:59am
6/9/2016 10:59am
Skeeter Hounes wrote:
What's the difference between the R6918B-8 and the R6918B-9?
THIS explains it better than I can. My bike called for the 8 but I got a great deal on a large box of 9's so I gave them a try. It didn't foul and, I never had any issues doing so.
wpark89
Profile picture for user wpark89
Posts
1160
Joined
12/9/2009
Location
Mattawa, WA, USA
wpark89 6/9/2016 2:45pm
6/9/2016 2:45pm
I'd run the expensive plug. Some guys run the cheap standard plugs and never have any problems. Between 95-07 I had 3 or 4 of the electrodes fail on the cheap plugs on rm 125s. It eats the piston and chews up the head usually before it blows out the exhaust. I did some research after the last failure and started running the 30 dollar suzuki plug.

It has to do with how the plugs are made and the cheaper plugs electrode cannot handle the high resonance the 125 makes at high rpm.

I think if you're a trail rider the cheap plug is fine. But if you ride a 125 like it's supposed to be ridden you will be money ahead with the oem plug.
Bruce372
Profile picture for user Bruce372
Posts
6329
Joined
4/1/2008
Location
USA
Bruce372 6/10/2016 3:36pm
6/10/2016 3:36pm
The $20 you save on a br8es will be a good start on the $500 you need on engine repairs when it fails.

It's a cheap insurance to get the proper plug. Because of aggressive ignition aND poor fuel, regular plugs often fail in rm125s
Jakes Dad
Profile picture for user Jakes Dad
Posts
1864
Joined
6/22/2009
Location
Brooksville, FL, USA
Jakes Dad 6/11/2016 5:40pm
6/11/2016 5:40pm
Bruce372 wrote:
The $20 you save on a br8es will be a good start on the $500 you need on engine repairs when it fails. It's a cheap...
The $20 you save on a br8es will be a good start on the $500 you need on engine repairs when it fails.

It's a cheap insurance to get the proper plug. Because of aggressive ignition aND poor fuel, regular plugs often fail in rm125s
Hundreds of hours, never failed once. Ripped up about $1400 worth of transmission parts in one race season on 2 bikes.

Here's my knucklehead at 14 flogging his 125, like fingernails on a chalkboard to me! LOLhttps://www.youtube.com/watch?v=6tGC2mRqdDc

Post a reply to: Spark Plugs For 2007 Suzuki RM 125