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| 74 CR125 air boot woes https://vintagedirtbikeforums.alp-sys.com/viewtopic.php?f=21&t=4659 |
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| Author: | travisb [ Mon Jul 04, 2016 5:33 pm ] |
| Post subject: | 74 CR125 air boot woes |
Hello, I bought a new Mikuni VM30-83, since the Mikuni carb that came on my bike was not responding as expected to jetting changes and had a 50mm inlet bell and poor fitting "straight" air boot (this boot lacked the height change from inlet bell to air filter cage). I am unable to mate the new carb-mating air boot to my air filter cage. The boot fits the 58mm carb inlet bell fine, but has a 78mm diameter where it meets the air filter cage. This is just small enough to not fit the 80mm air filter cage. I have not yet tried a hair dryer to stretch the boot to the wider opening, although the boot is soft and pliable. Have I got the wrong boot or a non-original air filter cage? Can a dremmel tool be used to remove some carb boot rubber to make it fit? UPDATE: the air filter cage opening of the boot that came on the bike as well as a new boot fitting a 26mm Mikuni (46mm air inlet bell) both measure 78mm. The new boot should stretch to fit the air cage. Thank you, Ben |
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| Author: | rayivers [ Mon Jul 04, 2016 7:36 pm ] |
| Post subject: | Re: 74 CR125 air boot woes |
The CR125M air boots fit the air filter cage flange very tightly, by design. You will probably need heat and a fair amount of stretching to get the boot on the cage, but once it's on and the clamp's in place it's not going anywhere unless it rips. The Honda 17253-400-000 and Suzuki 13881-41301 air boots both have 57mm carb-side and 76mm airbox-side openings and @ 75mm overall length, plus an upward offset from carb to airbox. Ray |
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| Author: | travisb [ Tue Jul 05, 2016 2:53 am ] |
| Post subject: | Re: 74 CR125 air boot woes |
Thank you, Ray. |
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