Hi I have rebuilt a c90 zz engine to put in my 74 st70 the two mounting tunnels for the studs are about 4mm wider than the gap in the frame .Has anyone done this change ? If so how much do you reduce the casing mount points by ? and on which side to keep the rear chain aligned ?
Cheers chippy
engine change
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wightegi
- Posts: 9717
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- Rides:: 12v 1988 e start C90,Royal Enfield Interceptor 650
- Location: Isle of Wight
Re: engine change
Unusual swap as the 90zz engine is as powerful as the 70 but not as reliable,a better swap would be a 12 volt 90 which would bolt straight in .
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chippy58
- Posts: 8
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- Rides:: dax
Re: engine change
I didn,t know that ,Would I be better rebuilding the 70 engine then ?
Cheers Gary
Cheers Gary
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chippy58
- Posts: 8
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- Rides:: dax
Re: engine change
When i read the figures ,it was 8bhp for the 90 & 5.7 for the 70
Cheers
Cheers
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Alan CF
- Posts: 6756
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Re: engine change
Ok...sorry. but the 6v c90 is pants.. if you had the 12v c90 engine it would drop straight in...
As most people are saying on here... your taking a step backwards re technology/finding parts and major running issues.
As most people are saying on here... your taking a step backwards re technology/finding parts and major running issues.
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JOHNBOY
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Re: engine change
c70 much more reliable than the 6v c90 charging problems with the 6v 90 stay with the c70 john
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chippy58
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- Rides:: dax
Re: engine change
Ok another lesson learnt the hard way Cheers
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Capitano
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