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Old 07-22-2013, 07:25 AM   #1
centdukesfan OP
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32mm to 40 mm

Ive been needing to get my 32mm bings on my r100 engine fitted properly. Right now I have a 40mm fitting with the 32mm rubber on one side to make it fit, but its a poor connection and I want to get it right.

Do you guys think this will work?
http://www.hiprospeed.com/HPS-Blue-S...5-150-blue.htm
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Old 07-22-2013, 07:38 AM   #2
blaine.hale
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Seems like it would...I use something pretty similar on my mikunis.
Sounds like you need to be the test pig

For the record, I use these:
http://intakehoses.com/Merchant2/mer...egory_Code=RSP
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Old 07-22-2013, 10:46 AM   #3
centdukesfan OP
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do they work well with the high heat from the engine?
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Old 07-22-2013, 11:02 AM   #4
disston
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Those intake runners are made for that application. I would assume they work with the heat from the engine.

What doesn't seem too clear from your original post. Is this bike running a pair of 32mm carbs but one cylinder has a 40mm intake?

There are disadvantages of mixing some of these parts but riders have been able to run 40mm Bings on 32mm heads. It's not recommended because there is a relationship between the carb and the way it feeds gas into the cylinder. The big carbs don't flow well at slow rpms. And if running 32mm Bings into heads with the 40mm runners you will have a mismatched set up also.

But the worst set up would be a 40mm head on one side and a 32mm head on the other. I don't think you'd be happy with how that runs.

It sounds like you are trying to do something like this maybe?
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Old 07-22-2013, 11:35 AM   #5
centdukesfan OP
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Ive got 32mm carbs from an r80 that are running into an r100 engine with a 40mm inlet.

Does that make sense?
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Old 07-22-2013, 12:10 PM   #6
disston
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OK. So both carbs are the 32mm variety and the engine has 40mm intakes on both sides. At least you have a balanced situation. It may run fine right away when you finish with new hoses because these should stop any intake leaks. Intake leaks make for poor idle and performance.

You may have to play with the jets some but I won't try to predict what you will have. Good Luck with it.
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Old 07-22-2013, 12:20 PM   #7
centdukesfan OP
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my mechanic said i should be good on the carb situation, the complicated thing is getting the 40-32 reducer that is made for high heat.
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Old 07-22-2013, 12:32 PM   #8
disston
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Those reducers are made for this application. Should be no problem.
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Old 07-22-2013, 12:41 PM   #9
airsmith
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what about getting some R80 or late model R100 head spigots and swapping out the ones on your heads to get the correct fit?
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Old 07-22-2013, 12:59 PM   #10
centdukesfan OP
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cant find anyone to source me a 32mm head spigot. Willing to listen if anyone has em!
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Old 07-22-2013, 01:18 PM   #11
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Why would you want to put 32mm carbs on big port heads?
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Old 07-22-2013, 01:26 PM   #12
centdukesfan OP
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swapped an engine when mine seized, plus the old r100 ran 32mms anyhow. Not too concerned about it.
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Old 07-22-2013, 06:40 PM   #13
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Quote:
Originally Posted by disston View Post
Those reducers are made for this application. Should be no problem.
From the ad:

Quote:
Remark
Silicone hose is compatible with water or anti-freeze such as coolant.
Silicone hose is NOT compatible with fuel or oil.
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Old 07-22-2013, 06:45 PM   #14
blaine.hale
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Quote:
Originally Posted by AntonLargiader View Post
From the ad:
I think he was talking about the ones I linked. They are most definitely compatible.
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Old 07-22-2013, 06:52 PM   #15
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Quote:
Originally Posted by AntonLargiader View Post
From the ad:
I think that means you're not supposed to use it as fuel or oil lines. Silicone elbows and reducers are very commonly used on turbo and supercharged intakes where they're exposed to heat and fuel mist. You might want to clarify what the maker is actually saying there. eg: http://www.siliconeintakes.com/
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