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The 2-Stroke Garage => Turning Wrenches => Topic started by: Greaser Greg on February 15, 2020, 06:28:36 PM

Title: Rd250/R5 hybrids
Post by: Greaser Greg on February 15, 2020, 06:28:36 PM
What are the advantages and drawbacks of mixing these motors/transmissions for street applications?  Will pipes that are tuned for a 250 work on R5's?
:cheerleader:
Title: Re: Rd250/R5 hybrids
Post by: m in sc on February 15, 2020, 07:34:28 PM
Pipes will work.

what exactly are you asking about? rd250 bottom and r5 top or other way around? clarify.  :umm: 6 speed trans is always better in my opinion though. I always look for 6th on my r5.
Title: Re: Rd250/R5 hybrids
Post by: Greaser Greg on February 15, 2020, 08:44:23 PM
Yes,  r5 top on rd250 bottom. So more gears and a quicker primary ratio?
How much power do the reed valves add to the smaller displacement engine as stock? Anywhere close to the r5?
Title: Re: Rd250/R5 hybrids
Post by: m in sc on February 15, 2020, 09:03:07 PM
rd250 isnt a far cry from the 350 power wise.  if you have a complete r250 motor, just install it.  :twocents: It just sort of depends what exactly you want? r5 with a 6 seed tranny and 350 primary gearing is fun. however, you should use the 250 oil pump and gear if you plan on keeping the primary gearing as 250.
Title: Re: Rd250/R5 hybrids
Post by: Greaser Greg on February 15, 2020, 09:50:37 PM
Hmm, food for thought. Thanks!
Now, on to my next post over yonder.