My sort-of restoration

[ryana89]

I spent my money on other things, and now I actually need money to get it running again

Haha, we've all been there.... heaps of times

Thats a pretty schmick/well made cannon, almost looks likes a resonator.

[GeorgeMK1]

Its strange, i changed my dizzy out today with the old one, and the plugs seemed to spark again. Didnt think anything on the dizzy could have went wrong. I dont want to count my chickens before they hatch, but it seems i have a spark now, after replacing the dizzy. Lets hope that was the problem.

So once i took the dizzy out, i went about re-doing the timing. Chucked top dead centre with a screw driver and cranking the engine, then chucked the dizzy in making sure the rotor was on the 1st piston. So i crank and the carby starts to splutter. Strange, must be the timing? So i did a little retard or advance i dont remember, and try crank agian. BAAAAAAAAAAANGGGG my carby caught on fire. Was a massive burst of fire and then quickly stopped. Was very lucky nothing major happened.

Why is is spluttering upon crank? Is that still my timing completely off?

[GRN_VAGN]

way off, 180 degrees out by the sounds of it

got the leads correct way? did you time it properly?

[dubmc]

[QUOTE=GeorgeMK1;663180]BAAAAAAAAAAANGGGG my carby caught on fire. Was a massive burst of fire and then quickly stopped. Was very lucky nothing major happened[QUOTE]

ahahah reminds me of when i building mine! cranked it over without oiling the socks and they decide to catch fire, had me running around the yard looking for a bucket before 6months of hard work went up in flames ahah no harm tho, luckily...left a sticky mess but

[sports racer]

You do know that your engine is a 4 stroke so you will have 2 x top dead centres in each fire of the spark plug?

You have to get TDC on the compression stroke. Check by putting your thumb over the spark plug hole when you turn it over - you should feel the air trying to push your thumb off the hole. Turn the engine over slowly with the screwdriver measuring TDC. Dizzy should be pointing at the lead that goes to the piston you are checking AND the points should have just opened by a couple of degrees engine rotation. Now you start it and fiddle with the timing.

Love the exhaust, where did you get it?

Cheers

Paul

[GeorgeMK1]

Love the exhaust, where did you get it?

Im suprised people like the exhaust hehehe, i thought it was a tad too ricey. Im planning on making a waaayy longer exhaust tip, i think 2.5" diameter. Should come out alright, will look like the original Fujitsbo exhaust from Japan.

On a good note, did TDC and all that, and the car started up. Played and played and played with the dizzy to get timing a bit better, but no matter what i do , the car wont rev past 3 - 3.5K revs. It seams to start backfiring then and running powerless.
In my opinion, it might not be on the EXACT TDC, therefor its firing before or after the piston comes up/down. Any advice on that would be very much apreciated, as i've tried everything.

Also now that it starts ill be buying a 32/26 weber, but dont know what to do with the current one.
Anyway, this weekend should have a few more updates.
George

[GRN_VAGN]

there is 2 marks on the flywheel, one is a big arse diamond which is either 6 or 8BTDC (before top dead center)
and then a small circle dent next to it.

TDC for the crank will be the Circle.

Seeing as your car used to run, im putting my money on the timing/ignition side.

[sports racer]

I don't think it's timing. With the amount of fidling you've been doing with the timing you should have got it right by now.

What's changed? You used to have it working well and now it won't go past 3500 rpm, something else isn't working. Fuel starvation? Spark breaking down?

Start be getting it idling then advance the dizzy so it's firing before TDC. Keep advancing it at idle until it starts to cough then retard it a fraction. That's the normal setting. You want it advanced as much as possible without coughing at idle. Are you sure you're advancing it? I always have to think twice when advancing and retarding.

Coils do go off and can break down at high revs so you should try another one.

Do you have an electric pump or mechanical? If mechanical then rev it and as soon as it starts to cough turn it off and check the float level in the carbie. If it's low then you are not getting enough fuel pumped in.

How old are the spark plugs? You might have a hairline crack in one that causes the spark to short out at high revs.

That should be enough things to try for now. Let us know how you go.

Cheers

Paul

[GeorgeMK1]

Thanks alot Paul, ill make sure to try out as much of those as i possibly can. Spark plugs might be an issue, as my carb is running very rich due to its big size, and when i checked the plugs, they were fair dirty, so perhaps a shortage of sparks at high revs.

Now it wont go past 2k revs. I have a external pump, but doubt thats the problem, as if it was it would start jerking back and forth etc.. but when it hits around 2k rev, it just back fires and runs very rough and wont advance any further. The fastest i can go is 70km haha

Ill give a few more tries today with a few of my mates, they might have some contrast ideas too.
Cheers fellas

[GRN_VAGN]

plugs should clear up a little while driving, unless the carb is really rich right over the rev rage.

Still sounds like something in the ignition, i have a working coil that im willing to donate to the cause... just PM your details, Just cover the shipping

Have you set the gap on the points, they are REALLY picky, this its 0.4mm, will check manual for you. i had it off slightly and it caused all sorts drama!!

[GRN_VAGN]

this reminded me of yours for some reason

[sports racer]

What size is he running on the front???

That green looks damn sexy.

[valgamesh]

That green looks damn sexy.

Agreed, but man does the orange have some fat poke, beast!

[GeorgeMK1]

plugs should clear up a little while driving, unless the carb is really rich right over the rev rage.

Still sounds like something in the ignition, i have a working coil that im willing to donate to the cause... just PM your details, Just cover the shipping

Have you set the gap on the points, they are REALLY picky, this its 0.4mm, will check manual for you. i had it off slightly and it caused all sorts drama!!

Sp the difference between the points should be 0.4mm? Im guessing i turn the dizzy till its at its highest point where the points are actually open, and set that to .4mm?

I cleaned all the spark plugs today, and still had the reving problem. So im ruling out spark plugs. Will try a donar spark plug leads i have in a few minutes and will see if that makes a difference. If not i have another coil too i can use, so thanks anyway for the offer Dan

I wasted all my time installing another extremely sexy blue guage in hehehe, just because i can. So now ill get stuck into the engine agian.

Oh and that is some sick poke, id like to go that far, but with stretched tyres and camber.

[GRN_VAGN]

yeah pretty much G... Just open it to its highest point and set then, thats all i did.

Pretty sure is 0.4mm... will go check now for you

Edit, yes its 0.4mm