Portaz13

Might have to as it pops and farts and is running very rich, blows a few flames etc. Did another comp test hot and all were over 150psi, so pretty sure it's just carb settings now to deal with

Cleaned the carbs, changed plugs and after a bit of throttle she's alive. Will fine tune tomorrow but she's certainly quite grumpy

Any clues what size these are?

Finally got plugs as they had to be ordered in and were not cheap the ones they said we're right for L model was ngk jr9c but they are not what's in it. I looked on ngk website and it shows a cross over in 89/90 the later being cr10eik , what's the right one you fellas use?

Certainly not stock, I believe they were brand new mikuni flat slides however no idea what size when I get home tonight I will check it out and take a few pics. It was an ex race bike which is why I assume it has quite a few changes. Will try to get some plugs on way home

I'm not sure what carbs they are but pretty sure it's severely over carbed as previous owner said he had bigger carbs due to planned dot head /stroker conversion. Also I forgot to mention he said he was riding and it kinda popped and then didn't run right after that. I've had it running on starting fluid but it's ugly. Anyway thanks guys I will look into basics. Fingers crossed that's all it is

Great, thanks for the reply, plugs are certainly black and probably wet, would it be possible that the trigger plate is faulty somehow?

Hi guys, finally got around to working out what's wrong with my 750 I purchased 6 months ago. It doesn't start but has spark and fuel. It backfires on occasion but that's it. Owner said it had low Compression oh number 2 and needed a rebuild. So today I checked Cam timing and did compression test with a shitty push fit car gauge which I know isn't accurate bit I got to a pretty even 150psi. When cranking it sounds fine and not like one cylinder down. Only thing is it has quite a few modifications on ignition system such as dynojet 3ohm coils, Dyna 2000 cdi and some kind of aftermarket trigger kit. This posed some problems as its nothing like my workshop manual. So I pulled #1 plug used an indicator to show me tdc then checked cams which line up perfectly and has 21 pins between them as it should. What do you guys think? Get a better comp tester or start looking at ignition issues? Any other help or direction is greatly appreciated as I just want go ride this old beast.

Clean run mate congrats

Welcome just post a slabby pic and all is good lol

Haven't even looked at coils yet, be interested to see what they are

I wish i was young but alas it's not the case, just first oil cooled non standard bike, thanks for reply good to hear it's a common thing on these oilers

Anyone know if these boxes are any good? I assume it replaces factory Cdi?jist removing my battery and came across it

Is the kill switch still working as they can be an issue also

After it cuts out is it easy to re start?

Is it possible there is left over oil in exhaust? Run it at varied load for 100kms and see if I clears up

What were the bores like? Did you hone them?

Mine doesn't have an airbox or filters, kinda thinking that's not the best idea

Sounds like a decent job, any pics of the old girl?

Hopefully it's all sorted then

Nice, was it low on comp?

OK will do

Looking forward to getting mine sorted

Any update on this?

How did it end up?