Please clarify all engine differences between NC23 and NC29

[lloydspencer]

Hiya, I have just brought what I believe is a NC29 engine.

From looking on here I know what part numbers show what engine is which but can someone please list the differences in the two engines please?

Thanks

[Wozza]

Lots of differences, anything in particular you need to know?

[lloydspencer]

I know they have different powers outputs and if it does turn out to be from a NC23 engine it wont fit in my NC29 frame without some modification.

Are the crank cases different, cylinders heads etc. Are there any parts the same?

What is the standard power and torque output of both?

Are there differences in the NC29 engines at all? I know the later nc29 carbs are different to earlier ones.

Also what engine do people prefer?

[Variablevalves suck]

Thought the main difference was the cylinder barrel being part of the lower case on the 29.

[BillingCBR]

I think the water union is on the rear of the block on one and on the front on the other, possibly some gearbox differences but don't have a manual here to check that.

[Wozza]

Are you trying to identify an engine?

Going by engine numbers, NC23 is NC23E-10...
NC29 is NC23E-13... or NC23E-14... or NC23E-15...

Is that any help? Not sure exactly what you're asking as there are many differences between the two engines - clutch, gearbox, cylinder head...

[stenca]

Maybe this will help ....

Model, Code and Production Year – CBR400RR-J (1988)
Frame Numbers – NC23-1020001 to 1036454
Engine Numbers – NC23E-1020001 to 1036510
Carburettor Number – VG04A
Wheelbase – 1370mm
Overall length – 2020mm
Overall width – 690mm
Overall height – 1110mm
Ground clearance – 120mm
Weight (dry) – 179kg

Model, Code and Production Year – CBR400RR-K (1989)
Frame Numbers – NC23-1090001 to 1098116
Engine Numbers – NC23E-1090001 to 1098123
Carburettor Number – VG04B
Wheelbase – 1380mm
Overall length – 2202mm
Overall width – 675mm
Overall height – 1110mm
Ground clearance – 120mm
Weight (dry) – 182kg

Model, Code and Production Year – CBR400RR-L (1990 and 1991)
Frame Numbers – NC29-1000001 to 1010598
Engine Numbers – NC23E-1300001 to 1310636
Carburettor Number – VP01A
Wheelbase – 1365mm
Overall length – 1990mm
Overall width – 670mm
Overall height – 1080mm
Ground clearance – 125mm
Weight (dry) – 180kg

Model, Code and Production Year – CBR400RR-N (1992 and 1993)
Frame numbers – NC29-1050001 on
Engine Numbers – NC23E-1420001 on
Carburettor Number – VP01A
Wheelbase – 1365mm
Overall length – 1990mm
Overall width – 670mm
Overall height – 1080mm
Ground clearance – 125mm
Weight (dry) – 180kg

Model, Code and Production Year – CBR400RR-R (1994 – on)
Frame Numbers – NC29-1100001 on
Engine Numbers – NC23E-1500001 on
Carburettor Number – VP01B
Wheelbase – 1365mm
Overall length – 1990mm
Overall width – 670mm
Overall height – 1080mm
Ground clearance 125mm
Weight (dry) – 180kg

[lloydspencer]

Can someone send or link to a picture of a NC23 engine and a NC29 engine please.

I am off to pick the engine I won up tomorrow and he said it is from a NC29 but I want to check as there is no way I am handing my money over if it isn't the correct engine.

He hasn't replied with engine number yet so cant check that.

It is quite far to drive for the wrong item.

Thanks

[stenca]

Can someone send or link to a picture of a NC23 engine and a NC29 engine please.

I am off to pick the engine I won up tomorrow and he said it is from a NC29 but I want to check as there is no way I am handing my money over if it isn't the correct engine.

He hasn't replied with engine number yet so cant check that.

It is quite far to drive for the wrong item.

Thanks

Look here : viewtopic.php?f=26&t=14975
There's a photo of the NC 23 engine .........

[lloydspencer]

Thanks for that.

There is one NC29 engine on ebay atm. Very bad picture but can compar what bits I can see.

From what I can tell there isn't a water outlet on the back on the cylinders on the NC29

And the Clutch cover isn't gold and is slightly different.

NC29 engine picture please :)