Socal,
Definitely keep an eye on it, especially when you get in the soft stuff. Its my BIGGEST concern with these. I made some entirely different style of stops after I busted out the sawzall and torch and got to work. First I removed the old ones so I HAD to make new ones.
As far as the plugs, I think Im running the 7, i will look tomorrow morning and let you know. I havent heard anything on the other plug yet. I was going to try it if the 7 didnt work as well as I had hoped. I may go and buy a 6 if thats not what I used just so I can compare, unless you go and get the 6 and we can compare [img]i/expressions/face-icon-small-wink.gif[/img]

 

I went yesterday to get an NGK plug for the 90, stopped at the mower shop and they only had the 6. He said he doesnt even know why he has em, they dont fit anything he sells or works on--- so he offered it to me for a buck. I said no, I need the 7. Went over to the Yamaha dealership and bought a 7 for $3.59!! Ouch, those fellas are making some money!

 

Is it NGK C7HSA ?
Chris

 

Erik,

The 6 is just a little hotter plug (I am actually running one now and I live up in Redding, works great). It would work good for winter riding or when cold outside. The 7 would be good to swap out for summer. If he offered it to you for a buck, I would pick it up just to have in the toolbox.... As far as the 6 vice 7 delemma, it a matter of one plug tip staying a little hotter than the other. In the grand scheme, I dont think you will actually "feel" a difference, its more just about plug tip temperature.... check this out, I got it from this site http://www.stealth316.com/2-sparkplugtech.htm (its for a Stealth car, but the plug analysis is general, scroll down till you find the graphic that goes with the "Heat Range" expanation below, It didnt copy, but its exactly what is relative to this discussion):

Heat Range
Spark plugs are designed to work with the insulator tip and center electrode temperature within the ideal heat range of about 500ºC to about 850ºC (~930ºF to ~1560ºF). If the plug tip temperature exceeds about 1050ºC (~1920ºF), the air-fuel mixture in the combustion chamber tends to pre-ignite before a spark is produced. If the temperature is less than about 400ºC (~750ºF), the insulator tip and center electrode tend to foul with carbon and oil deposits, which can cause misfires, lowered available spark voltage, and poor driveability.

The spark plug heat range is a measure of how fast heat is transferred away from the insulator tip and center electrode through the threads into the cylinder head and cooling system. The length, surface area, and projection of the insulator nose, the volume of space between the insulator nose and the shell, the center electrode core material, and the thermal conductivity of the insulator material control the heat range. In the hotter heat-range spark plug, a longer insulator nose creates a longer heat flow path from the insulator tip to the threads and a smaller heat transfer area in the insulator, which allows heat to build up in the tip. For the same type of plug, one heat range represents about 70º to 100ºC (128º to 180ºF) of heat dissipating ability.

In summary, the 6 plug is more closer to the ideal heat range plugs are designed to operate in, regardless of vehicle. The 7 just has a shorter heat flow path, which means it transfers heat faster to the cylinder head, thus not getting as hot.

Take it for what its worth.....

 

This is also a great explanation about plug #'s here: http://www.saabworks.com/projects/sparkers.html

 

Yeah, I know its a hotter plug, just figured it wasnt necessary so I got the reccommended 7.

So yer up in Redding, huh? I was just there all day yesterday, as I am quite often--- a good friend of mine lives off of Sierra View and I come up alot for help on my VW drag car..........which BTW, Ill have out at Kool April Nights comming up in a few weeks and if I can get the NOS system and wiring finished up, Ill take it out the drags that Friday nite. Look for a flat-black 1962 super-street style VW bug with the name "Warbird" on the side in German script--- thats my rust bucket.

 

Probably a good idea unless your kid is a slow poke, like mine. I'll prob switch when it gets warm....

Yeah, I'll be out at the races, my buddy might race his '69 Camaro if he gets it put back together in time. Are you gonna show it at the Civic?

 

Isnt the main show at the fairgrounds? I was up there last year, I thought it was at the fairgrounds. Anyway, yes, I plan to park it over there.

If you go the Redding strip alot, you might know or at least have seen my buddy Jeff out there in his light blue primer chassis Karmann Ghia, running in the mid- 10's. Or maybe my buddy James in his green buggy or his white turbo bug.

 

They have the main show 'n shine at the Civic Auditorium every year. I havent gone the last few years to that cause they charge like $7 for adults and $5 for kids to get in (used to be $2 and kids were free). My family and I do enjoy going over to Hilltop (if its not raining) for the cruise and watching all the rods do burnouts.... my 4 y.o. son gets a kick out of that...

 

Now that's some research on them there plugs!!! It sounds more like the 6 is more ideal for this quad then the 7 according to the research you posted but I'll try it out and see and I'll tell ya all about it when I do Drew not that I think I'll really even notice the difference unless I start fowling plugs but we'll see. Still I have to say all money aside that this quad is really awesome. Of course mods are a really good idea and I'm planning on removing the stops and rewelding new ones in that will be more durable and suited for actually stopping the steering from one side to the other. I just finished up sealing all the electrical connectors with some RTV and heat shrink for both water and to prevent wires from just coming out of the plug. Loctited all the bolts and nuts from the plastics and other areas that looked like they needed some love and put it all back together. I plan on putting wheel spacers on in the near future for added safety but it's still a really stout quad compared to the smaller ones. From 1 to 10 I would give this quad an 8 before the mods and an 11 after the mods. I'm going out this weekend again and will put the quad to the test cause I'm taking all the buddies kids to go at it.

As for the Jetmoto 150, way worth the money!!!! This thing is one heck of a quad all around. Suspension is a little stiff for the lighter kids but not too bad for someone who's a little heavier, although with they way I ride it's going to need competition shocks soon! I took it out tonight and had my buddies take it for a spin up and down the street. Sounds great, pretty quiet actually with a deep exhaust sound. I'll be able to comment more once I break it in, I'm treating it just like my wifes Z400, first 20 hours it's kept at 1/2 to 3/4 throttle with breaks every 20 minutes for a cool down and an then a complete 20 hour before it really get's put to the test. I'm going to benchmark it against the Z400 on the track and we'll see if I break anything and whether or not I get left behind by the Z400. I hope to have a video or two from the head to head along with some action photos, I have a couple of jumps in mind that might just put the quad to the test. Racewayatv.com and JetmotoUSA job well done so far!!!!