Honda 305 Motorcycle Engine Rebuild: Clutch Basket & Oil Sling Install
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- เผยแพร่เมื่อ 29 ก.ย. 2024
- Let’s make more progress on the Honda 305 motor. We’re installing the clutch basket and oil sling on the CB77 Super Hawk!
NOTE: the washer on the oil sling goes on the outside NOT on the inside. An update video is in the playlist.
About the Honda CB77 Super Hawk via WikiPedia
en.wikipedia.o...
The CB77 had, at only 305cc, a relatively big engine in comparison to most other Japanese bikes of the period, although it had performance to rival much larger motorcycles from other countries.[5] It quickly built a reputation for reliability, and was equipped with luxuries such as an electric starter.[3]
The engine on the CB77 differed from that of the touring C77 version, in that the crankpins on the crankshaft were spaced 180 degrees apart.[citation needed] This had the benefit of making the engine smoother at higher revs but due to the firing sequence of one power stroke following another, the engine note sounded 'flat' and 'low-revving'.[citation needed]
The CB77 was built on the experience Honda had gained in Grand Prix racing, and differed greatly from previous models. It had a steel-tube frame instead of the pressed frames of earlier Hondas,[5] and a telescopic front fork.[1] The parallel twin engine, the biggest then available in a Honda, was an integral element of the bike's structure, providing stiffness in a frame that had no downtube, and was capable of 9,000 rpm. It could propel the bike at over 100 mph; as fast as British parallel twins with higher displacements, and with great reliability. Cycle World tested its average two-way top speed at 168.3 km/h (104.6 mph), and its 1⁄4 mi (0.40 km) time at 16.8 seconds reaching 83 mph (134 km/h).[2]
Author Aaron Frank called it, "the first modern Japanese motorcycle... that established the motorcycle that we still operate under now, more than forty years later."[5]: 59
3:54
When you took apart the funny round nut with the shock wrench, how did you bust it loose? Did you have to hold the crank still somehow?
I honestly don’t remember. I think I may have used and oil filter wrench on the rotar to hold it. With a rag under it to protect it.
Nice photography. but it is clear you do not have much mechanical knowledge. There are many errors in what you call various items, and some of you information is wrong.
Care to elaborate? The bike has been doing fine almost a couple years later. I followed the manuals to the best of my ability. But institutional knowledge is always welcomed. If I got something wrong LMK. Learning every day! Thanks for chiming in.
NOTE: I believe the nut on the gear should have been installed with the chamfered edge toward the inside. That may seem contrary to the usual method for other nuts, but that is the way my 305 was arranged from the factory. I bought the bike new and it had never been off before now. Putting the flat side of the nut to the inside would flatten the "tabs" on the washer, which is not desirable. Remember, the washer was concave when removed, not flattened out. Hope this helps.
Great intel. Thank you. Not a lot of documentation on that.
👍😀🏍🏍🏍🏍🏍🏍🏍
Lots of emojis!!!
I sent you a pm of the message between Bill and I
Appreciate all the insight and effort. Glad to dig into this to figure it out.
What size or part number was that shock wrench you used?
I think it’s a 45mm Open End Spanner. In the standard tool kit. Tons on eBay or even Amazon.
Great work!
Thanks, man!
I just sent a message to Bill Silver about the thrust washer on the oil slinger. Ive taken engines apart that have the thrust washer between the engine case and centrifuge, but I always put it on the outside for two reasons. I'd rather have the pin rub on the washer than on the aluminum centrifuge and if you put it behind, it drops into the case if you pull the centrifuge out through the small hole without taking the whole clutch cover off. If it falls into the case without being detected, it could do some serious damage when restarted.
Bill said it goes on the outside
That’s weird. I just literally checked 4 printed manuals and cmsnl and it’s clearly on the inside. Even on disassembly it was on the inside (understanding that’s not always reliable). Not seeing a reference to one on the outside at all. I can see how it’d be appropriate on both ends though.
Wish I could find a source that confirms that. I might tear into another 305 engine to see another living example. The one on the inside makes sense to me as it’s a flat surface to a flat surface. I’m actually surprised there aren’t two. But again I’m not seeing a source indicating there isn’t one on the inside either. Another puzzlement. Thanks for checking with Bill. Appreciate it.
I agree with you and checked the manual and CMSNL as well. I see it on the inside. You could post the question on the 305 Facebook page or just message Bill. If the washer was on the inside when you broke the slinger down I’d like to think it’s ok but I’ve always put the washer on the outside.