- Joined
- Apr 17, 2003
- Messages
- 5,375
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- Menno, SD
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- www.ulmerracing.com
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- USA
- Snowmobile
- 2014 Yamaha SR Viper LTX, 2014 Yamaha SR Viper RTX SE, 2015 Yamaha SR Viper MTX SE 162 (turbo), 2015 Yamaha SR Viper MTX SE 153
- LOCATION
- Menno, SD
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- www.ulmerracing.com
On the Vector especially it seems like it's very touchy to how much choke it gets even with the stock spark plugs. Oak Hill stated it just how I start a Vector as well.
SharkAttak
TY 4 Stroke God
JDMCRX said:
i don't think they do what the cr10ek's do, cr10ek's 2-3 h.p. gain, proven
I'm trying the denso's...same as the 10ek's but someone on here who was running the 10ek's said the denso's dont foul as easily....although not sure why anyone would foul anyways..(other than cracking the throttle before warm up)
sleddheadd
TY 4 Stroke God
wow! there is a ton of info. on here!
bbjorklund99
Extreme
I bought my Rx-1 used with 1,000 miles on it and I had it for 2 years without ever fouling a plug. I did nothing special other then I choked it full when I started it for the first time in the morning and as soon as it started I would pull the choke back enough to make is idle at about 1500-2000 rpms until the warm-up light went out. Once the light went out I would move the choke to the off position. The engine was bullit proof and never gave me one ounce of trouble. Maybe the 3 cylinder is different.
I did run premium gas in the sled from the day that I bought it. Not sure if that would make a difference in plug life or not.
I did run premium gas in the sled from the day that I bought it. Not sure if that would make a difference in plug life or not.
apex yooper
Expert
plugs
My question is, why don't they come with these plugs. Yamaha is well aware of this claim, and in Snotech's Dear Ralph column, they said the Yamaha engineers laughed at this claim of 2-3 HP. I would think they would love to add the 2-3 HP.
My question is, why don't they come with these plugs. Yamaha is well aware of this claim, and in Snotech's Dear Ralph column, they said the Yamaha engineers laughed at this claim of 2-3 HP. I would think they would love to add the 2-3 HP.
yamaha is more about durability and dependability that horsepower..
- Joined
- Apr 17, 2003
- Messages
- 5,375
- Location
- Menno, SD
- Website
- www.ulmerracing.com
- Country
- USA
- Snowmobile
- 2014 Yamaha SR Viper LTX, 2014 Yamaha SR Viper RTX SE, 2015 Yamaha SR Viper MTX SE 162 (turbo), 2015 Yamaha SR Viper MTX SE 153
- LOCATION
- Menno, SD
- WEBSITE
- www.ulmerracing.com
Yamaha wants the utmost reliability and dependability in all weather conditions. That being said at -40*F or super cold weather the colder heat range spark plug may not be as reliable and dependable as the stock spark plug. The CR10EK spark plugs are the same that were installed from the factory in the Yamaha R1 bikes.
Ported Hornet
Expert
I just bought the CR10ek plugs for my apex. Could someone please explain to me how a colder plug makes more hp than the hotter plug simplied in the stock sled. I am a little skeptical about this but after reading the endorsements by Ulmer and Mike Knapp, how can you quesion the pro's. Just curious for my own know how?
Thanks,
PH
Thanks,
PH
laymans terms...here' something to wrap your mind around....
how does higher octane make more power in vehicles that require it?
the additive that raises octane slows the flashpoint (delayed ignition)of the fuel....thus compressing the fuel slightly more before the explosion...and making more power..
a colder plug in our application kinda does the same...slowing the point of ignition fuel and therefore getting a better explosion..
add to that the electrode configuration and where the spark occurs can help as well...
how does higher octane make more power in vehicles that require it?
the additive that raises octane slows the flashpoint (delayed ignition)of the fuel....thus compressing the fuel slightly more before the explosion...and making more power..
a colder plug in our application kinda does the same...slowing the point of ignition fuel and therefore getting a better explosion..
add to that the electrode configuration and where the spark occurs can help as well...
Ported Hornet
Expert
sj said:
Thanks,
Just trying to get used to this 4 stroke mentallity. I guess I have been riding 2 smokes for to long..
Thanks again!
Ported Hornet
Expert
What is everyone doing to prevent the caps from losing on the CR10ek plugs. I know in the past this was a common problem I encouter on 2 stroke sleds so I switched to solid cap plugs. Has anyone though about or used loctite to prevent this problem? What are your thoughts?
I personally use a small amount of locktite only on the lower few threads...although many others have disagreed with me on that..I've experienced good results..
someone else here had a great idea I will do next time..
crimp the end with a side cutter so when threaded down it locks..
someone else here had a great idea I will do next time..
crimp the end with a side cutter so when threaded down it locks..
Do our sleds have too aggressive of a timing curve? Is that why the colder plug makes more power?
ApexerER
Expert
Oak Hill said:I agree with ZR800EFI - spend your money with the guys who advertise here and help us all out with tech info. You will get more power from a colder plug and the double electrode gives you a better spark. The spark acually jumps from both electrodes giving you more of a exposed spark and more power. Just my 2 cents!
The spark is not going to jump from electrode to electrode. It is going to take the path of least resistance
