Question about 1978 Yamaha RD 250

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What is gap on sparkplug on 1978 Yamaha 250 snowmobile?

I need to find what to set the gap on my sparkplub on my snowmoble when I replace the sparkplug

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  • Dick
    Dick May 11, 2010

    Yamaha didn't make an RD 250 snowmobile in 1978.

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Hi nana
Leaving the plug set to what it came as is as good as set correctly, unless you have dropped the plug  already:). Attempts to adjust the gap are often done wrong, and potentially damage the plug. Unless you are race prepping the engine/indexing it also, it will be fine straight out of the box. Good likely hood that the old 2stroker will need a new plug long before the gap becomes and issue:) Hope this helps. 
regards robotek

Posted on Jan 20, 2009

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