engine

Hi - I feel sure this will have been asked before but here goes - where can I find accurate info on torque settings for rebuilding a CBB750 SOHC - I have a K4 and a K2 in bits at the moment - looking at the manuals I have it says corned bolts at 15 ft pounds but this seems not very high to me -...

I’ve got a 1979 750LTD and I’m looking for the complete right side exhaust HM425, Sankei 2043. Let me know what you have. Thanks

The Yamiya exhaust seems to be considered a reproduction of the HM300 pipes. Carb jetting would need to be different between the 300 and 341 systems and I understand the 300 flows better. Its hard to nail down the differences, so is there anywhere you fellow members can point me to a...

Looking to trade valve tappet shims 25mm, have to many #300,#295,#290. Need #285,#280.. I pay shipping your way you pay shipping my way

Hi, my first CB750F has been going well, I have it up and running with brakes so decided to put a few miles on it before I strip it down for painting. Ive got a blowing exhaust which doesnt help but can anyone help me diagnosing a rattle I have coming from the left side around the end of the...

WANTED - HM 300 Exhaust singles or a set in very good condition. Rare but not impossible and if you don’t shoot you don’t score. I have a 1971 Honda Cb750 K1 but purchase with a 4-2 system. May drive to pick up if reasonable distance from Port Huron, Michigan. 48060. Otherwise would need...

I just purchased a Honda chopper and the frame is from a 1982 CB900C but, the engine is not. Can someone please tell me or direct me to what year and displacement the engine came from? The engine number is RC01E-2307161. Any help would be greatly appreciated.

Hello, brothers New here. I have a Cb750f 1977. Not too green though. Just got this bike and dammit pretty much right away oil is spraying out the fins. So I am replacing the gaskets but . . . I have a problem. All for bolts under the pucks won’t tighten down. Can’t even get a torque at 5lbs. I...

Is there a known discrepancy in the service manual(s) for valve spring lengths? The manual lists a specification of 1.60” and a wear limit of 1.57” for the inner spring (un-compressed length). Most of mine were at 1.57” or below so I bought an APE racing valve spring kit from 4into1, only to...

My mechanic says he can't buy parts for a valve job. Or a head. Or a used engine. For a 79 CB750F. Any suggestions please?

Has anyone had prob get the starter clutch gear back on the crankshaft of ac79 cb750 k I had use a 3 bolt puller to remove it

I took the carbs off the bike to bench sync them, put them back on and now the bike is starting up at 5,000 rpm + and it won’t go down, choke is off. I was afraid of letting it run cold on such high rev, max time was 30 seconds and it won't go done. When I killed the engine some type of...

Good Afternoom, Please I got a question about CB750 Nighthawnk 1993 motor cylinder, there are four(4) 10 mm small bolts, down location, two (2) in the front and two(2) on the back, one longer tham the other one (Back). Which side goes the longer one (Right or Left) and how long is it (mm) ...

Is there even such a thing anymore? Looking for STOCK exhaust for my 79 750F SS. Any leads? Flea bay has a couple listings, but they're really ratty. Does such a thing exist anymore, or are they like Sasquatch, some claim to have seen him, but don't know where he is at the moment.

Hi Guys, Not sure if this is the correct place to ask this, but i have a 74' CB750 engine and im wondering if i can put it into a 1981 (or similar) frame? Question is, will this fit? are there any issues that i should be looking out for?

So I have tracked down a ticking/ knocking noise to my primary chain tensioner. I cant seem to locate any New OEM tensioners anywhere. Does anyone have any places worth checking for inventory on this item? Does any one have tips for maybe refurbishing my tensioner if none can be found? Thanks.

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I have NOS CA 750 Honda cylinder head still in it's original shipping box with the original paper wrapper and plastic bag. The part number is stamped on the outside of the box. I've probably had it for over 30 years. I was wondering what it might be worth, any ideas? Regards, Mike

Hi everybody, I'm new here in the forum, I'm Italian but I live in Mexico; I need your help because I felt in love with a CB750 (see picture :love:, I know there still is a lot of work to do ) but there's a problem and I don't know what to do. Basically the papers say that it is a 1974 HONDA...

1970 model CB750 (not sand cast), the engine number has been hand engraved / etched into the housing. Explanation by owner / seller is they used to break chains and damage the housing. When Honda provided a replacement housing they required an engine number and they or the dealer engraved the...

Looking for a 4 into 4 exhaust.

I was having problems with the engine missing under acceleration, that eventually deteriorated to running on three cylinders. I took it to a Honda shop in town and the mechanic said it needed a valve job. I wasted $1700 on that. It ran the same, but added backfiring to it. I tightened the...

Hello looking for some advice on my 1981 cb 750c and it’s low compression. I adjusted valves after my initial reading of 62,65,72,75 psi on my compression test after doing valves numbers all jumped couple psi dropped little bit of oil into the spark plug holes and they jumped to 135,130,125,145...

Hi everybody This is my first post, I’m from México, I’m rebuilding a CB750F 81’, I need to replace crankshaft bearings, I bought some in ebay but they’re not fit :(, so, did you replace some of those, what are fit for my engine? is there any place to buy those that could deliver to Mèxico...

I’m trying to understand, what if any, difference there is between the engines on the 1979 CB750K DOHC bike and the 1979 CB750F DOHC bike (called the CB750F-A in some markets). I was sure that I had read somewhere that the CB750F DOHC bike had different cam profiles and larger valves than the...

Good Morning Friends!! Can anyone tell me if the motor mounts from a 1982 SOHC CB750 will fit a 1974 SOHC CB750. For whatever reason. I have lost my brackets for this 74. Yes.... I am a dumbass!

Good day New here and working on getting a 80 750k running properly. Low compression on 3 of 4 and what got me to this point is that cyl. 2 was cold at first. Valve cover is off at this point and about to check clearance. Looking for advice and or someone in the cedar rapids IA area with...

I recently purchased a '80 Super Sport that has been sitting for four years. Rebuilt the carbs, new battery, new spark plugs, and tried to start it. At first I had some trouble getting it to turn over and thought I broke the starter because all i could hear was a beep/squeak coming from it...

I'm now to the point of repairing my transmission where I am putting everything back together. Everything is (seemingly) in the right place however, I am not sure where this bearing assembly came from. Do any of you know what this is for/where it goes? The rod through it is hollow with a pinhole...

Hi everyone, I recently purchased a 1978 Honda cb750f and by my mistake I did not inspect it very well being this is my first purchase motorcycle. There is a lot I need to do to get it running to my standards but one main issue that I am having is the upper engine mount is cracked pretty bad...