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Author Topic: CB750: Long & Short blocks ?  (Read 1075 times)

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Offline 01Thomas

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CB750: Long & Short blocks ?
« on: March 03, 2019, 12:20:24 PM »
HI
CycleX is advertising that they have CB750 Four Long and Short block motors for sale.
What exactly is are these things? The all have gearboxes attached (unlike AT&SF with it's chopped-off gearboxes and blanked-off crankcases).

I could ask CycleX but while I'm here...

regards
Thomas
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1971 Honda CB750 Four K1 [Engine: CB750E-1113521 / Frame: CB750-1113838]
1977 Seeley Honda CB750F (F1) [Engine: CB750E-2551214 / Frame No: SH7-655F]

'96 Yamaha YZF750SP & '81 Moto Guzzi SP1000 & '80 Moto Guzzi 850 LeMans II & '82 Bimota KB-3 [Frame No 49] & '66 Ducati 50 SL/1 & '53 Miele K-50 & '38 Miele 98

Offline jgger

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Re: CB750: Long & Short blocks ?
« Reply #1 on: March 03, 2019, 12:43:00 PM »
Typically in automotive the difference is either having the head and/or associated parts in some cases or no head/manifold/or oil pan. Short block would be everything below the head gasket and sometimes it includes an oil pan.

I can't speak for cycle x but my guess is head vs. no head and maybe a few other things.

« Last Edit: March 03, 2019, 12:44:32 PM by jgger »
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Online PeWe

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Re: CB750: Long & Short blocks ?
« Reply #2 on: March 04, 2019, 03:04:22 AM »
« Last Edit: March 04, 2019, 03:22:18 AM by PeWe »
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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

Offline 01Thomas

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Re: CB750: Long & Short blocks ?
« Reply #3 on: March 11, 2019, 02:24:15 PM »
OK, Thanks for the explanations, everyone!
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1971 Honda CB750 Four K1 [Engine: CB750E-1113521 / Frame: CB750-1113838]
1977 Seeley Honda CB750F (F1) [Engine: CB750E-2551214 / Frame No: SH7-655F]

'96 Yamaha YZF750SP & '81 Moto Guzzi SP1000 & '80 Moto Guzzi 850 LeMans II & '82 Bimota KB-3 [Frame No 49] & '66 Ducati 50 SL/1 & '53 Miele K-50 & '38 Miele 98
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