czakky Posted March 6, 2015 Author Posted March 6, 2015 Alrighty according to MG cycle the black ones Mr. Fugazzi has listed second should work. Ordering some up now.
docc Posted March 10, 2015 Posted March 10, 2015 I cross posted this on czakky's Head Guards thread. "I just bought a spare set of the red 90˚ Champion spark plug resistor caps on US ebay from Green Spark Plug Company LTD in UK for 13.88 USD. They are designated: Champion Spark Plug Cap PRO5M Red " I rather dislike posting ebay links since they die out shortly, but this one has a complete description of the actual OEM part for the early bikes with red caps, made in the UK by Champion.
Scud Posted March 10, 2015 Posted March 10, 2015 FWIW - my bike still has the original cables. They were made by MTA, which I had never heard of. I did find their UK distributor, and it is an Italian company. Don't know if this helps anybody (because I could not find a place to buy them) - but here's a picture of the original plug cap for 2002: Funny thing - apparently MTA was a model of an actual tractor in the US in the 1950s. So when I looked up MTA spark plug wires I got sent to an antique farm and tractor supply store. It would have been even better if the tractor wires were the same as on the Guzzi.
docc Posted March 10, 2015 Posted March 10, 2015 Oooooh, noooooo! Not the tractor thing again! So, evidently, the Champions were only used on the RedFrames and Rosso Mandello. Does the MTA part also contain a 5,000Ω resistor?
Scud Posted March 10, 2015 Posted March 10, 2015 I don't know the resistance. I'll help if I can though. Is there a way to find out without removing the tank, then the wire, then measuring the resistance? Old Tractor = reliable, charming, and lots of torque. Good enough for me.
docc Posted March 10, 2015 Posted March 10, 2015 Yeah, the resistor/caps unscrew from the end of the ignition wire at which point you can simply measure the resistance. When I found one of mine had doubled in resistance, I thought it good method to replace it.
Scud Posted March 11, 2015 Posted March 11, 2015 My MTA caps measured 5.01MΩ and 4.94MΩ. I guess they are keepers.
docc Posted March 11, 2015 Posted March 11, 2015 Looks like they're "in spec." And you're keeping a couple spares in your kit?
Scud Posted March 11, 2015 Posted March 11, 2015 And you're keeping a couple spares in your kit? No. I got a couple new plugs for my kit though - plan to swap them with the ones in the bike soon. Are the caps prone to fail? Or perhaps your intent is to suggest additional insurance against a parking lot tip-over? From what I gather, the V11's spark plugs are designed to hit the ground first so we don't scratch our plug protectors. I guess that would damage the cap too.
docc Posted March 11, 2015 Posted March 11, 2015 The plug and the resistor cap are ridiculously vulnerable to even a light tip-over. For a few bucks and very little space all of us should be carrying a spare set of plugs and spark plug caps/resistor covers. One each for our bike and one each for our buddy's Guzzi!
Scud Posted March 11, 2015 Posted March 11, 2015 Here are some red NGK 5MΩ caps for $6.95 each on Amazon. Free shipping, $14 insurance. Part number TB05EM. Good thing to have along for my upcoming trip. Thanks.
Kiwi_Roy Posted March 11, 2015 Posted March 11, 2015 Has anyone mentioned these http://www.mgcycle.com/index.php?main_page=product_info&cPath=37_157&products_id=1590
gstallons Posted March 11, 2015 Posted March 11, 2015 Your post says 5 meg ohm , do you mean 5 k ohm ?
docc Posted March 11, 2015 Posted March 11, 2015 Has anyone mentioned these http://www.mgcycle.com/index.php?main_page=product_info&cPath=37_157&products_id=1590 Yeah, moto fugazzi linked them in post#2. (The red NGK complete with ignition wires for 'later' V11). I've replaced my resistor caps, but I wonder if the ignition wires themselves ought to be replaced after "so long?"
czakky Posted March 12, 2015 Author Posted March 12, 2015 I've replaced my resistor caps, but I wonder if the ignition wires themselves ought to be replaced after "so long?" Still original Docc?
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