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I'm about to roll 10k on the clock. I've done pretty well to maintain the chain and stuff. done a few oil changes (every 3k) so i've got a question, i run my bike pretty hard and i've never done a valve job... am i screwed? Do i need to take care of that soon or am i still doing ok. when it gets cold out (32F and under) my bike will have a dead spot from 3000rpm to about 4200rpm... is this a sign that i need to do this. Should i be tuning my carbs? I dont have a manual to tell me this stuff so someone help me out here, what do i need to do and how soon do i need to do it.
 

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Don't panic, If buy "Valve Job" you mean adjust the tappets. just do it when you get a chance. The flat spot is not the valves but a little break down of all the systems. Start by changing the plugs and cleaning the insides of the plug boots. Then open and adjust the pilot screws.

FOG
 

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Would the cold flat-spot improve with partial cover for the radiator & keeping the engine warmer?

And/or switching to the cleaner-tip platinum plugs?
 

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Put the cardboard in the radiator, get the temp into the normal zone, This will help. The flatspot is agrivated by the fuel condensing on the intake track walls, causing a lean condition. Platinum plugs are always a good Idea.

FOG
 
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