Big Trouble Honda VFR 750 (1986)

Stuster · Scooby Slapper Joined: 01 Nov 2009 Karma :

Hi all.

we have here a VFR 750 86 model, now after a few weeks or so the bike started to loose power. now it appeared that one of the heads have gone, so... instead of repairing this it was decided that it would be easyer to buy a new engine and a lot more cost effective pft Rolling Eyes

We found a engine from a 86 model for a good price, got the engine back and fitted it into the frame, wired the electrics up but there was on left from the loom that had no place to fit on the engin, it turns out that the broken engine has a cam sensor on it, where as the new one doesnt.

What i was hoping was to find the correct CDI unit for the new engine. Would this work or would we need a new loom, the ebay seller said we should have had no problems, he advertised it for the bike we have here but with a no returns policy, so bit screwed really.

Any advice guys would be great, oh and just for the record we have tried to fire it up, the engine does turn.

Thanks in advance Smile

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Yamaha TZR125 x 3 Lifan LF125 14-F x 3 Jinlun 125 x 1 Honda CBR 600 F1 Honda Varadero 125cc I am now starting my Honda VFR400 NC30 Project Smile

(Still ongoing 27/02/18) Daelim Roadwin 125R

Stuster · Scooby Slapper Joined: 01 Nov 2009 Karma :

lol, looks like i am screwed...
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Yamaha TZR125 x 3 Lifan LF125 14-F x 3 Jinlun 125 x 1 Honda CBR 600 F1 Honda Varadero 125cc I am now starting my Honda VFR400 NC30 Project Smile

(Still ongoing 27/02/18) Daelim Roadwin 125R

Kickstart · The Oracle Joined: 04 Feb 2002 Karma :

Hi

Surprised at a bike that age having a change like that between different minor models.

With a cdi change you would need to check the wiring diagrams carefully. Might plug in easily or they might have swapped a load of things over (had that with my FZ750, bought a decent Japanese market bike loom and then found that although various plugs were the same Yamaha had decided to swap around the wires in the plugs).

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

Bezzer · World Chat Champion Joined: 14 Apr 2005 Karma :

Have a word on the VFR forum, someone on there will know the easiest way to sort it.
https://www.bikersoracle.com/vfr/forum/
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I used to be indecisive but now I'm not quite so sure.