Author Topic: Aftermarket manifold boots  (Read 645 times)

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Offline zabzob

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Aftermarket manifold boots
« on: August 15, 2018, 06:59:35 PM »

I've got a 75 CB750 with rock-hard manifold boots. I'd like to eliminate them as a source of possible air leak, as well as eliminate the frustration of trying to get my carbs back on when it comes time to do so. Honda ones are looking like $120 to my door. Anybody used the far cheaper aftermarket ones? Any issues?
1975 CB750K5

Offline dusterdude

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Re: Aftermarket manifold boots
« Reply #1 on: August 16, 2018, 03:32:55 AM »
Vintagecb750.com has nice boots but they're about 100 usd

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1972 k1 750
1949 fl panhead
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1998 cbr600 f3

Offline dusterdude

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Re: Aftermarket manifold boots
« Reply #2 on: August 16, 2018, 03:35:50 AM »
My bad 88.00

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mark
1972 k1 750
1949 fl panhead
1 1/2 gl1100 goldwings
1998 cbr600 f3

Offline evanphi

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Re: Aftermarket manifold boots
« Reply #3 on: August 16, 2018, 06:43:22 AM »
I had those ones and they cracked after only two years. :(
--Evan

1975 CB750K "Rhonda"
Delkevic Stainless 4-1 Header, Cone Engineering 18" Quiet Core Reverse Cone, K&N Filter in Drilled Airbox
K5 Crankcase/Frame, K4 Head and Cylinders, K1 Carbs (42;120;1 Turn)

She's a mix-matched (former) basket case, but she's mine.

CB750 Shop Manual (all years), searchable text PDF
Calculating the correct input circumference for digital speedometers connected to the original speedometer drive

Offline Duke McDukiedook

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Re: Aftermarket manifold boots
« Reply #4 on: August 16, 2018, 07:20:08 AM »
Pro tip: Go with OEM if you can.
"Well, Mr. Carpetbagger. We got somethin' in this territory called the Missouri boat ride."   Josey Wales

"It's Baltimore, gentlemen. The gods will not save you." Ervin Burrell

CB750 K3 crat | (2) 1986 VFR750F

Offline zabzob

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Re: Aftermarket manifold boots
« Reply #5 on: August 16, 2018, 06:50:18 PM »
Pro tip: Go with OEM if you can.

You are right. I can either go OEM and have them for 20-30 years or replace the aftermarket ones in 5 or 10. I've already decided against the aftermarket cam chain tensioner based on horror stories I heard here.
1975 CB750K5

Offline PeWe

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Re: Aftermarket manifold boots
« Reply #6 on: August 16, 2018, 09:47:48 PM »
I tried cuzinimage cheap boots, deep cracks after a few months! Price vs life not good = very expensive.
You risk the engine when boots are cracking, leak air causing lean. My old Honda boots never cracked, only too hard.
CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967