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[greaser]

I have got iridium plugs in my RE 535 GT with the stock suppressor cap I have no problems at all, I don't know where Les has got his idea of cleaning the iridium plugs will ruin them.

I have 2 other bikes also with iridium plugs fitted & one of them which is the Honda CB750 TT café racer was running too rich so i re-set the air-fuel-mixture & then I took out the iridium plugs & cleaned them with a spark plug wire brush & I have had No Problems since.

Regarding getting caught out in the rain, all you need is WD40 silicon spray, give all the visible & vulnerable electrics a fine coating every 6 months..job done

[RocketRR]

I found that the plug cap was not fitted correctly on mine and fell off when I first went to remove it which worried me for a few minutes..

I run a standard BPR6ES with no issues, best thing I did was fit a MotoBat battery, transformed the electrics.

[Les]

I only found about Iridium plugs about a year ago when doing some servicing work on my car and discussing these plugs with a local motor parts shop many articles about not cleaning them, if you do want to clean them up a bit use an old toothbrush and something like carb cleaner nothing abrasive, info Here

[Les]

Well that went wrong try this Here

[Smudger]

Isn't the HT lead on the 535 bonded to the coil and therefore not replaceable on it's own ?

[Gwilly]

Glad you wrote that Smudger, I thought that as well, but nobody picked up on it so thought i was mistaken.. Nice one..

[jefrs]

The HT lead is indeed captive to the coil but the coil is tucked away and well protected from the weather, so the likely culprit is the oem HT cap (mine fell apart). If you use a suppressor plug (NGK BPR) then you want a non-suppressor HT cap (the NGK one), if you use a non-suppressor plug (NGK BP) then you want the suppressor cap (the Champion). You may not have sufficient slack on the HT lead, I had to re-position the coil (tank off) to provide enough wiggle to change the HT cap, part of the problem was the HT lead was pulling out of the oem cap.

[jefrs]

The iridium has an electrode the size of a pinhead so once it does foul it cannot find many new places to keep sparking. A plug should self-clean but this is why a hotter plug is used in a colder engine (does that make sense?). The iridium BPR6EIX did foul on mine but I did not try the hotter BPR5EIX, I went to the conventional BPR5ES (after curing the cause). Bosch-India aren't Bosch and their 7 and 8 seem to be equivalent to a NGK 6 but then NGK give their 6 as equivalent to a Bosch (Europe) 7 and their 5 as equivalent to a Bosch 8, the only way to tell is to try them out as motors and work load use varies.



Plug fouling comes up often enough to warrant carrying a spare, and then it will never go wrong.

[jefrs]

Nigel - good luck with your back and wrists on that caff racer. Enjoy!

[steve1]

Thanks for all the input. Ended up with leaving the iridium plug in. New NGK non resistor plug cap and new copper cored HT lead. It's not bonded in the coil - just screwed in like the plug cap. Started it and chucked several buckets of water sideways on directly at the plug and engine generally. No problems at all. This test prior to the mods and it stalled every time. Seems I can go out in the rain again!