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Author Topic: 75 CR250 GP cylinder  (Read 1843 times)

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Expat

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75 CR250 GP cylinder
« on: September 11, 2008, 08:42:46 pm »
Does anyone know if the optional "GP" cylinder for the '75 250 Elsinore improved performance much ?

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Maico31

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Re: 75 CR250 GP cylinder
« Reply #1 on: September 11, 2008, 08:59:10 pm »
The only one i know of was for the '74 250. Did they make one for the m1 and m2?
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Expat

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Re: 75 CR250 GP cylinder
« Reply #2 on: September 12, 2008, 05:53:51 pm »
I have an M1 GP cylinder which is a bit buggered up with some broken fins and scored bore.

Just wondering if performance gains ( if any) are worth the effort saving it
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Offline k2000x

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Re: 75 CR250 GP cylinder
« Reply #3 on: December 10, 2008, 04:23:14 pm »
i have a 74 cr250m that my dad got new in 74...he got the factory optional cylinder with larger carby and reed block wich looks like my modern v force reed block in my kx500 i never rode the bike standard(i wasnt made at this stage) but ive rode the thing now and she goes well 4 a 74 mod dad recons it was money well spent in the day
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Maico31

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Re: 75 CR250 GP cylinder
« Reply #4 on: December 10, 2008, 07:02:55 pm »
I remember the optional cylinder but haven't heard of a reed valve available from Honda other than the Gem aftermarket one.
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Offline k2000x

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Re: 75 CR250 GP cylinder
« Reply #5 on: December 11, 2008, 01:22:19 pm »
yeah ive(my father) got a gem on his vb250 it has gem lettering on it this doesn,t have any markings some one out there might be able 2 help it has 4 pedals(reeds) and 2 v shape blocks that hold the reeds just like the modern v force design
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Maico31

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Re: 75 CR250 GP cylinder
« Reply #6 on: December 11, 2008, 08:08:39 pm »
That sounds a lot like the Gem that i had on my 74 cr250. It didn't have any markings on it either.
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