Triumph BSA Norton High Qulaity Reed Alloy Crankcase Breather

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MAP Cycle has 18 left in stock

$39.95

High quality, crankcase breather. Includes one-way, alloy reed valve. More information below:

$39.95

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Description

Details

Triumph Deluxe Belt Drive Crankcase Breather Kit

This breather was designed to work with our belt drive kit, but it can be used on most any Triumph, BSA or Norton twin to allow the crankcase to properly ventilate without letting it pressurize.

Features:

Heavy-duty, alloy, one-way reed valve breather
One way flow
Alloy construction to resist corrosion

Fits:

Most Triumph, BSA and Norton twins

Dimensions

Engine/crankcase side pipe (larger pipe with a lip) has an OD of 14mm and an ID of 10.3 mm.
The smaller exit pipe (in line with body) has an OD of 12mm and an ID of 9.5mm.

Installation Note:

Install the breather so the tube exiting the engine crankcase enters the larger, lipped pipe which sits 90-degrees to the reed box. The exhaust or exit tube (smaller pipe with no lip) sits inline with the reed box. You can test the direction of flow can be tested by gently blowing on both fitting. The larger intake is the only fitting that will allow air to pass. The smaller fitting will not.

Additional Information

SKU	MAP2092B
Manufacture	MAP Cycle

Additional Information

Additional Information

SKU	MAP2092B
Manufacture	MAP Cycle

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Product Question

Product Questions

Do you sell a catch can/bottle to go with this?

Question by: Alan Feinman on May 6, 2020 11:31:00 AM

Sorry Alan, we do not have a catch can available at this time.

Answer by: HN (Admin) on May 13, 2020 3:01:00 PM

-5

What diameter are the breather hose spigots?

Question by: David Holt on Jan 14, 2018 1:03:00 PM

Intake fitting (lipped) .55 inches
Exhaust fitting .47 inches

Answer by: rick c (Admin) on Jan 15, 2018 11:14:00 AM

-9

IS THE BREATHER SUITABLE FOR A ROAD GOING A75, T150 AND T160 WITH A 750CC OR A 1000CC ENGINE. ANY SUGGESTIONS ON FITTING?

Question by: HYWEL DAVIES on Aug 9, 2019 11:35:00 PM

This reed breather is great for street or race bikes and will work on any of the triples or, any motorcycle with blow-by issues. The reed breather allows crankcase pressure to escape, without letting any air to be sucked back into the crankcase through the breather. In other words, it only operates in one direction.
We have not put one of these on a T150 or T160, but it would probably be run from the breather tube exiting the clutch cover on both models.
I have attached a link to my website which shows some ways this style of breather is used on the twins. I would image the first example would be closely applicable to the triples as well.
http://www.vintagebikebuilder.com/triumph-breather-diagrams.html

Answer by: rick c (Admin) on Aug 12, 2019 10:55:00 AM

Should this breather be attached inline to the intake cam's crankcase breather (without the rotary disc) on a Triumph pre-unit motor, or should it be run on a separate breather on the timing chest? Some motors seem to have breathers in both places.

-1

Question by: todd on Nov 13, 2017 12:58:00 PM

For a “timed” reed valve type breather to work efficiently one nearest the source is always best. For street applications using the OEM vent without the rotary valve would suffice. However, big bore or racing bikes should machine an opening in the timing chest. This port should have the least obstructions to crankcase with access to the largest volume of air. Avoid locations where splash could pose an issue. If you find one isn't enough, you could run two.

Answer by: rick c (Admin) on Nov 14, 2017 1:07:00 PM

-5

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Triumph BSA Norton High Qulaity Reed Alloy Crankcase Breather

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