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Post by hardhatharry on Mar 31, 2015 21:05:08 GMT 1
I have lots of bits of 250 and 400 engines in a couple of boxes and they are mixed in together.
I have dug out an RD400 case, crank, barrels and head so thats a start
Are the gearboxes the same on 400s and 250s and if they arent how can I tell the difference?
I also have two flywheels and coil plates how can I tell which is a 400 one? (does it matter?)
On the other end of the crank, are the generators the same on 250 and 400 and again is there a way of telling the difference?
Are the reed blocks, inlet manifolds and carbs the same?
Thanks for any help you can give me
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Post by gazzatt2 on Mar 31, 2015 21:41:50 GMT 1
gearboxes the same
primary gears different
fly wheels the same provided matching to ignition type i.e. points or cdi
stators are the same
reed blocks are the same different between point and cdi models
carb rubbers the same except cdi 400 have balance pipe
carbs different
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Post by hardhatharry on Mar 31, 2015 22:01:18 GMT 1
both my cases and barrels are DX so points all the way
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Post by hardhatharry on Apr 1, 2015 0:43:38 GMT 1
When you say primary gears are different are you talking about the front sprocket?
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Post by arrow on Apr 1, 2015 1:31:22 GMT 1
When you say primary gears are different are you talking about the front sprocket? The 400 gear on the crank has more teeth than the 250, and clutch basket has less teeth than 250. 21/68 for the 250 23/66 for the 400 This is for the E/F, I don't know if the C/D has the exact same difference. |
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Post by spondon440 on Apr 1, 2015 8:40:33 GMT 1
When you say primary gears are different are you talking about the front sprocket? The 400 gear on the crank has more teeth than the 250, and clutch basket has less teeth than 250. 21/68 for the 250 23/66 for the 400 This is for the E/F, I don't know if the C/D has the exact same difference. primary gears are the one on the end of your crankshaft and the one on the back of your clutch basket. Andy |
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Post by rdjames on Apr 1, 2015 22:56:13 GMT 1
the reed blocks are different
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Post by hardhatharry on Apr 2, 2015 12:28:22 GMT 1
the reed blocks are different Hi whats the difference and how can I check I have 400 reed blocks? |
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Post by gazzatt2 on Apr 2, 2015 22:10:01 GMT 1
C/D are alloy
E/F are plastic
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Post by hardhatharry on Apr 2, 2015 22:14:19 GMT 1
So there is no difference between a 250DX and a 400DX?
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