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HT CDI... Where to put it?
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Bobbie
Leominster
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February 11, 2020 - 2:41 pm
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I imagine the topic name will have a simple answer from some. But, at the risk of alienating myself from the purists, I have (following many roadside  rescues and much fiddling with the original electrics) purchased an electronic ignition system for my D3 150cc. Its the basic Electrex STK 1257 unit.

However, I do want it to appear as original as possible and whilst the bulk of the kit has it's place to fill, I can't make my mind up where to put the HT CDI unit (I can't find any recommended locations) and want it to be as discreet as possible... albeit the HT lead will need to come in from a different angle to the old points driven unit.

I'm thinking under the tank but I'll need to cut the new CDI bracket to fit as the holes don't align. Would anyone agree this is the optimum solution or does anyone have a better suggestion? I can't see online where others have gone with this... perhaps it's just obvious, I'm not an engineer after all.

welcome any thoughts

Many thanks Bobbie

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Blue Heeler
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February 11, 2020 - 2:57 pm
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Hi Bobbie,

Some folk make an alloy bracket and attach that to the under-tank frame bracket...also can be used as a bit of a heat sink. Pics on the Net show all sorts of modern gubbins bolted to such a plate.

Watch out for over polishing such a plate, I have heard of earth contacts failing due to over keeness with the old elbow grease(rubbing furiously with Solvol)

Regards

Blue

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Bobbie
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February 11, 2020 - 3:24 pm
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Blue Heeler said
Hi Bobbie,

Some folk make an alloy bracket and attach that to the under-tank frame bracket...also can be used as a bit of a heat sink. Pics on the Net show all sorts of modern gubbins bolted to such a plate.

Watch out for over polishing such a plate, I have heard of earth contacts failing due to over keeness with the old elbow grease(rubbing furiously with Solvol)

Regards

Blue  

Thanks Blue... I'd heard of someone using the underside of the seat, but didn't like the idea too much. I agree under the tank is probably the way to go. I didn't know if there was a conflict with hot electrics and proximity of fuel.

Cheers

Bobbie

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Blue Heeler
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February 11, 2020 - 3:35 pm
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Bobbie said

Thanks Blue... I'd heard of someone using the underside of the seat, but didn't like the idea too much. I agree under the tank is probably the way to go. I didn't know if there was a conflict with hot electrics and proximity of fuel.

Cheers

Bobbie  

Your engine cylinder head gets piping hot, but you`ll be on the move most of the time hopefully. Electrics should be nicely sealed to keep the weather out....and tank a good example or properly sealed internally, if it is rotting/holed. I`m tempted to say you`ll be ok...it`s a popular spot, as long as nothing is touching the tank to rub through it.

Blue

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swalsh58
St. Mary's Bay, Kent
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February 11, 2020 - 4:07 pm
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I have a Bones unit on my D5 and that is fixed under the tank on an ally bracket. It seems to work ok and its out of the way too

Current bikes......1958 D5, a 77 Suzuki GT250 and a B175 almost ready for the road and a 76 Honda C90 in the workshop. A 1980 Honda CB400N now on the road and my everyday ride is a 2011 Harley Davidson Sportster. All bikes (except the D5) are now for sale...

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Bobbie
Leominster
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February 11, 2020 - 4:11 pm
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Many thanks again. I'll make sure nothing rubs/vibrates against the tank and my fingers firmly crossed it sorts all my annoying starting issues.

 

Bobbie

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jolon1
Leigh Lancashire
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February 12, 2020 - 2:25 pm
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coil-4-1.jpgI've been asked this before, but only just found out how to upload photos. Hope this helps.

sp_PlupAttachments Attachments

D7 & D1 Racer

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Bobbie
Leominster
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February 12, 2020 - 3:58 pm
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jolon1 said
coil-4-1.jpgI've been asked this before, but only just found out how to upload photos. Hope this helps.  

Perfect thank-you

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jolon1
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February 13, 2020 - 12:52 pm
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Sorry, 2 pics have shown up. That's with me trying to upload. No just realised it's the one you have posted.  oops

D7 & D1 Racer

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