Whats people thought of this

[chownsy]

If you're going to go to that much trouble there an NC30 engine on ebay for 150 quid.
There's standard looms and CDI's for that in the For Sale section now for very little money.

I own this now got it for £100 with hydraulic clutch system, tank, carbs, cdi unit, frame, complete front brakes and wheels.

[Neosophist]

Did you speak to Ngneer? He had a running 24 engine cheap

[Neosophist]

the loom / ignition boxes are differnet, you'll need the ingition box at any rate

Darn it the loom dont come with it only the CDI unit.

What would happen if i run the NC21 engine on a NC24 loom and Ignition box? (thought Ignition box and CDI unit was one and the same)

They dont' have a CDI unit, they use a TCI unit. I just call it an ignition box as CDI is technically wrong. However,

The NC21 uses a different ignition box to the NC24.



Sits behind the battery



NC24 sits under the seat

Some of the plugs are different too depending on the age of the bike. So you'll need to chop / change.

Best to run this engine with the supplied loom / carbs and igition box.

Did you get the clutch master-cylinder on the handlebars too?

You can ditch it and use the cable clutch if you change the sprocket cover and push-rod from your engine.

[chownsy]

I would much rather a hydraulic clutch as getting a new clutch cable is now impossible and having to change the inner is all you can do, i did this but if i get the hydraulic clutch ill be okay.

I will see when i collect the bike what i do.

I did contact ngneer and never got a reply., His listing said it was in an untested state.

Can you answer me this please as i still aint got a preceise answer what happens if you run a NC21 on a NC24 carbs, loom, ignition box and and coil packs? (as Coils look identical as NC24's, Carbs are virtually identical and ill be putting my 24 carbs on the 21 engine)

[Neosophist]

in a nut shell, it probably wont run, or wont run right.

carbs are differnt, air jets and main jets are different, along with different mounting rubbers.

the nc21 has different cams / valves and internals.

Never tried mixing them, dont know if it'd work with the NC24 igntiion box.. it Might run but I can't imagine it being right.

I Dont' have the ignition advance curves and the other data to hand but there are differences, so with the NC24 box on there its going to be firing slightly differently.

If it's an NC21 engine stick with the NC21 carbs, NC21 loom and NC21 ignition box otherwise your setting yourself up for more problems.

The NC21 carbs are going to fuel slightly different too, as the NC21 has a slightly lower compression ratio compared to the 24

BOTH the NC21 and NC24 make 59PS (60bhp) from the factory so your not going to be getting anymore power intermixing parts, just causing problems.

Clutch cables are availble, I brought one about 2 weeks ago for £13.00 + VAT

Part: 22870ML0721

Search for it on lings.com... dispatched tomorrow

The hydraulic clutch is good until it gets old and worn and starts leaking or sticking, i tried to get an old neglected one going but it was never as good as the cable clutch so stripped it off.

Have one hyrdalic on one of the engines (was new old stock) and seems ok... no major differences apart from less maintainance.

[chownsy]

in a nut shell, it probably wont run, or wont run right.

carbs are differnt, air jets and main jets are different, along with different mounting rubbers.

the nc21 has different cams / valves and internals.

Never tried mixing them, dont know if it'd work with the NC24 igntiion box.. it Might run but I can't imagine it being right.

I Dont' have the ignition advance curves and the other data to hand but there are differences, so with the NC24 box on there its going to be firing slightly differently.

If it's an NC21 engine stick with the NC21 carbs, NC21 loom and NC21 ignition box otherwise your setting yourself up for more problems.

The NC21 carbs are going to fuel slightly different too, as the NC21 has a slightly lower compression ratio compared to the 24

BOTH the NC21 and NC24 make 59PS (60bhp) from the factory so your not going to be getting anymore power intermixing parts, just causing problems.

Clutch cables are availble, I brought one about 2 weeks ago for £13.00 + VAT

Part: 22870ML0721

Search for it on lings.com... dispatched tomorrow

The hydraulic clutch is good until it gets old and worn and starts leaking or sticking, i tried to get an old neglected one going but it was never as good as the cable clutch so stripped it off.

Have one hyrdalic on one of the engines (was new old stock) and seems ok... no major differences apart from less maintainance.

Thank you for that answer

Well i will have to get myself a new loom then as they are keeping that (but will wait until i have it as the ignition box might be the later type that can be plugged into my loom)

Also as my dads and electrician and im a mechanic, im sure i can re-wire the CDI unit to fit my loom if needed to save hassle.

The hydraulic clutch is going to be used if it works fine, if not ill just swap the parts over.

[Neosophist]

The NC21 Ignition box is split over 3 plugs where as the NC24 one is split over two.

Just checked, all NC21's should have the 3 plug type and NC24's the two plug type.

Not sure if the 3 plug type (NC21) will fit under the seat where the NC24 one is... on the NC21 it sits in the space at the end of the battery tray, this will of course mean moving quite a few wires if you put it there, otherwise try and fabricate a bracket for the rear seat.

The only other plug I recall being different is possibly the pickup coil / neutral switch plug.

Personally i'd have waited for a 24 motor but no doubt you'll get it running soon enough.

[chownsy]

The NC21 Ignition box is split over 3 plugs where as the NC24 one is split over two.

Just checked, all NC21's should have the 3 plug type and NC24's the two plug type.

Not sure if the 3 plug type (NC21) will fit under the seat where the NC24 one is... on the NC21 it sits in the space at the end of the battery tray, this will of course mean moving quite a few wires if you put it there, otherwise try and fabricate a bracket for the rear seat.

The only other plug I recall being different is possibly the pickup coil / neutral switch plug.

I will take a look at all this as soon as i get it, I might be able to fabricate the loom to work with my NC24 loom. (Might be make an adaptor so i can test the engine before i go into the permanent change route)

Also even if i sell this engine on and buy a 24 engine, I can still make profit on it all.

Personally i'd have waited for a 24 motor but no doubt you'll get it running soon enough.

I know you would personally wait, but when your going to loose 4 years NCB within a week unless i have a running bike that can be put in for an MOT, the insurance companies wont re-insure it. So then i would have to sell the bike as i would be literally unable to insure it then.

[Neosophist]

The insurance company won't reinsure it unless its MOT'd, were you involved in some kind of accident?

Who are they? They sound well dodgy.

You usually insure a vehicle first, then take it for MOT, then tax it.

Oh and if you look at http://www.footmanjames.co.uk/ and do a classic bike quote, you may find its really cheap, they don't count no claims bonus either so that doesn't matter!

[chownsy]

The insurance company won't reinsure it unless its MOT'd, were you involved in some kind of accident?

Who are they? They sound well dodgy.

You usually insure a vehicle first, then take it for MOT, then tax it.

Oh and if you look at http://www.footmanjames.co.uk/ and do a classic bike quote, you may find its really cheap, they don't count no claims bonus either so that doesn't matter!

Every insurance company i spoke to, will insure it on the day of the MOT and not before,

I have not been insured for nearly 2 years now due to a serious shoulder injury from a rugby incident.

I had plenty of time to get this bike running, was running and all ready for MOT then the headgasket problem came back and i was back to square 1.

I am happy with my new purchase and i will do all the work to get it fitted and running so i can get it MOT'd and Insured.


I will take a look at that link and see if they are cheaper on the classic bike insurance.