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motor number
Posted: Mon Aug 09, 2010 9:11 am
by arbalest
Can anyone tell me what this motor is? I have not dismantled it, but based on the intake port size, it looks like an R100.
Motor number is 6242314
Thanks,
Mike Lydon
Re: motor number
Posted: Mon Aug 09, 2010 9:39 am
by SteveD
Re: motor number
Posted: Mon Aug 09, 2010 9:40 am
by Kurt in S.A.
According to this VIN decoder (
http://www.bmw-z1.com/VIN/VINdecode-e.cgi), that VIN is for an '82 R100RT. You can also measure the cylinder diameter. An R100 has a bore of 94mm or thereabouts.
Kurt in S.A.
Re: motor number
Posted: Mon Aug 09, 2010 9:50 am
by arbalest
Thanks, Steve and Kurt. I was looking more to determine what carbs I need for it, as it came without carbs.
Mike Lydon
Re: motor number
Posted: Mon Aug 09, 2010 10:01 am
by arbalest
Just one other question, will a 1970 4 speed transmission bolt up to this motor, or do I need to find a later transmission?
Thanks,
Mike
Re: motor number
Posted: Mon Aug 09, 2010 10:05 am
by SteveD
I musta put the wrong number in. Kurt's was more accurate.
Carbs should be the big 40mm BING's. 94/40/107-108
Re: motor number
Posted: Mon Aug 09, 2010 10:24 am
by Kurt in S.A.
arbalest wrote:Just one other question, will a 1970 4 speed transmission bolt up to this motor, or do I need to find a later transmission?
Remember that the clutch pack and input shaft to the transmission changed with the 1981 models. Things will fit but you might have to make changes to the clutch and/or input shaft to the tranny. Then there might be "issues" with the lever arm at the back of the tranny. IMO, I think it's more trouble than it's worth.
Kurt in S.A.