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300 Fourtrax - Spark Plug Heat Range?

12262 Views 23 Replies 6 Participants Last post by  rottenscoundrel
Hey guys. I bought a 94' 300 4x4 last April. I just got to see it for the first time a week ago. I moved from Alberta to New Brunswick.

So my bike has a Highlifter 355cc big bore kit, web cam, clutch kit, white brothers stainless steel exhaust, 2" lift, a warn 2x4 kit, 124 main jet ( I believe ).

So I have a few questions, I want to change the spark plug and I'm going to change all the fluids. The original owner ran full synthetic oil with lucas additive. He said when it's cold out you had to let the bike warm up or else the clutch would slip. NO good for me. I'm going to run conventenal oil. BUT my question is... should I change the heat range of the plug considering it has the big bore kit?? He has the stock plug in the bike and says it runs hotter with the kit?!?!

I need to replace the front shocks and the front wheel bearings too. I bought all ball wheel bearings.

Now that I'm in my new house and hopefully get to get out on the bike I'll be on here a lot more.

I know for sure I want the detroit gearless locker and 12" rims so I can install disk brakes. And yes I'll research everything before posting as most stuff is already covered. I couldn't seem to find much on heat range of plugs though.

I'll get some pics of the bike later this week and post em up.

Thanks for any advice.
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I would definetly say it is running lean!!!!!!!!!!!
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