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So, what about these Kyosho Hype Cool Fire engines?

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So, what about these Kyosho Hype Cool Fire engines?

Old 07-01-2018, 06:27 PM
  #26  
the Wasp
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hmmm 11 years, shipping must have been pretty cheap

pretty engine tho !!

Jim
Old 07-01-2018, 07:50 PM
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LOL!

I measured the carb throat and the insert bore in the crankcase. The carb throat was 0.550" and the insert bore is 0.510", a .040" tolerance fit!

No wonder it was such a bear to remove! I am convinced they had to use a press to insert it at the factory.

I machined the throat down so it is now a slip fit.
Old 07-01-2018, 07:52 PM
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Originally Posted by Hobbsy

Tom, does it have a HS needle or does the needle in the barrel do it all Thanks.

OK, I managed to answer my own question
Yeah, the HS is what you see and the LS is a screw in the carb barrel.
Old 07-02-2018, 07:05 AM
  #29  
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When I first saw yours I didn't see the HS needle, that's why the question. Thanks
Old 07-03-2018, 08:32 AM
  #30  
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It's ready for the test stand.


Old 07-03-2018, 09:48 AM
  #31  
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boy they surly are pretty engines, I would like a 91

Jim
Old 07-03-2018, 09:51 AM
  #32  
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"from the photo" the 69 looks to have a small diameter carb, if true it should have a good usable power band

Jim
Old 07-04-2018, 08:49 AM
  #33  
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Originally Posted by Kmot
Interesting observation, because these engines were marketed in Europe and I thought nitromethane was not used much over there?
Before the EU was formed it was a hit or miss thing. I paid attention to this topic as I used to live over there. One country got it dirt cheap, and then one country paid exorbitant taxes, and then another couldn't even get it. I think Ireland was the country that didn't tax nitro, but don't trust my memory on this. We don't seem to have as many European fliers on the Internet now. The European Union thing probably unified nitro costs. We should ask Jaka the next time he posts something.

Last edited by blw; 07-04-2018 at 08:51 AM. Reason: spelling
Old 07-04-2018, 10:18 PM
  #34  
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They are re-styled MDS engines, as were the RMX line sold by RipMax in the UK.

The carb shown is almost certainly non EOM supplied. It is a Webra slide carb. Probably why it was so hard to remeove. It's neck was not the correct 'drop in' size to fit in place of the original MDS carb.

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