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Will a Nc23 engine from a later nc29 work on earlier bike

Posted: Tue Jun 11, 2019 6:16 pm
by Vengy1
Iโ€™ve got a later nc29 engine not sure of exact year and a cbr400rr hurricane which has destroyed its engine. Will the later engine work on the carbs and electrics of the earlier bike ? Any help is greatly appreciated ๐Ÿ‘๐Ÿพ

Re: Will a Nc23 engine from a later nc29 work on earlier bike

Posted: Wed Jun 12, 2019 11:20 am
by sa.racing
Think the engine mounts are different if memory serves me correct,

best bet would be to sell the NC29 as there still worth a few quid and pick yourself up an NC23 motor (sure there's one for sale in the for sale section on here)

Re: Will a Nc23 engine from a later nc29 work on earlier bike

Posted: Wed Jun 12, 2019 5:05 pm
by Vengy1
Thanks for the reply ๐Ÿ‘๐Ÿพ Found the engine no. Reference in the Haynes manual and it would appear I have another j series engine which should just bolt straight in and not a nc29 engine. The silver cases instead of gold put me off as I didnโ€™t have a engine number reference. Thanks for the help tho

Re: Will a Nc23 engine from a later nc29 work on earlier bike

Posted: Wed Jun 12, 2019 5:28 pm
by sa.racing
No worries mate,

Easiest way to tell is the NC23 engines have fins on the crank cases where as the NC29 engines have a smooth crank case.

Re: Will a Nc23 engine from a later nc29 work on earlier bike

Posted: Wed Jun 12, 2019 5:36 pm
by Vengy1
The cases r also finned ๐Ÿ‘๐Ÿพ All the mounts line up and the engines just been cleaned for putting in but the integrity of said engine is unknown as of yet so fingers crossed ๐Ÿคž๐Ÿพ lol it turns over with compression and its got oil in it that isnโ€™t emulsified which means nothing lol

Re: Will a Nc23 engine from a later nc29 work on earlier bike

Posted: Thu Jun 13, 2019 10:44 am
by CB1pod70
sa.racing wrote: โ†‘
Wed Jun 12, 2019 5:28 pm
No worries mate,

Easiest way to tell is the NC23 engines have fins on the crank cases where as the NC29 engines have a smooth crank case.
Also the NC23 has a water outlet on the back of the cylinders going to the water pump where as the NC 29 has the outlet on the front of the cylinders

Re: Will a Nc23 engine from a later nc29 work on earlier bike

Posted: Fri Jun 14, 2019 8:08 am
by Vengy1
The engine is in ๐Ÿ‘๐Ÿพ Thanks to everyone who replied it was appreciated greatly ! The key has been put away โ€˜safeโ€™ ๐Ÿคฌ is there a way of bridging the pins in the ignition connector to get the ignition on please ? As I donโ€™t want to ruin the ignition as itโ€™s original and the key will turn up the second I screwdriver it ๐Ÿ˜‚๐Ÿ‘๐Ÿพ Thanks Alex

Re: Will a Nc23 engine from a later nc29 work on earlier bike

Posted: Fri Jun 14, 2019 10:40 am
by CB1pod70
If you disconnect the ignition barrel you you can make up a bridging wire to sit in the connector from the loom. You need to bridge the red & red/black wires. Make sure you use wire that is the same gauge or thicker than the red wire and just use some crimp electrical connectors from Halfords or the like.

Re: Will a Nc23 engine from a later nc29 work on earlier bike

Posted: Fri Jun 14, 2019 11:10 am
by Vengy1
Thanks for the reply thatโ€™s a massive help and very appreciated ๐Ÿ‘๐Ÿพ