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Cruisers => LF250 => Topic started by: splinter UK on April 21, 2010, 08:38:25 AM

Title: Iridium spark plug
Post by: splinter UK on April 21, 2010, 08:38:25 AM

Hi
Could anyone please tell me what iridium sparkplugs to get for LF250-B.
Thanks

Title: Re: Iridium spark plug
Post by: Rogerborg on April 26, 2010, 11:39:37 AM

The LF250-B comes with Torch A7TC plugs as stock, so the NGK part would be CR7HIX.  However, the Yahama original engines take CR6HIX plugs.

It's horses for courses here; the '7' plugs dissipate heat faster, which is good if you're doing high speed runs (or idling in traffic), but the '6' plugs will help the engine warm faster on short runs.

I'm on CR7HIX at the moment, but I find the engine's taking longer to warm up and come off the choke than I'd like, so I'll be changing to CR6HIX next pay-day.

Title: Re: Iridium spark plug
Post by: splinter UK on April 26, 2010, 02:20:10 PM

Thanks very much  :)

Title: Re: Iridium spark plug
Post by: Rogerborg on May 07, 2010, 05:54:52 AM

I've just switched to CR6HIX plugs today, and the bike feels a little happier, with smoother acceleration from low revs.  There could be other factors, but I'd suggest going CR6HIX rather than CR7HIX at least on short acquaintance.