Honda 87 CBR600F Hurricane, project

[GS1150Pilot]

They are truly cool. So many awesome Hondas from the past. If I could only have one make of Japanese bike, it would be Honda.

CBx
CB900/1100f
CX650 Turbo
VFR750
Africa Twin
Hurricane

Too many great designs, and quality second to none.

[B.C.G.S.]

Hey, where's the guy that will tell you you're doing it wrong and it won't be worth anything? lol

[Buffalo Bill]

Hey, where's the guy that will tell you you're doing it wrong and it won't be worth anything? lol

He ain't found me yet…so I still don't know I'm stupid…

[Rob S.]

They are truly cool. So many awesome Hondas from the past. If I could only have one make of Japanese bike, it would be Honda.

CBx
CB900/1100f

Too many great designs, and quality second to none.

I'd add the VF 1000 Interceptor. Those were monsters in their day.

Or the CB750...CB350...

Hard to narrow it down, but the CBX ain't a bad place to start.

[Buffalo Bill]

The SOHC CB750 or 650 both have my attention. Like to try some vintage racing, the SOHC valve system looks really cool.

[nvr2old]

The SOHC CB400F-CB500/550-and CB750s are so easy to work on. Valve adjusting is a breeze, way easier then the bucket and shims of slightly newer engines. You can do a complete tune and service in less then an hour.

For as ugly as that engine is on the outside, the inside actually looks really good. The oil looks like it was changed yesterday. Check out how clean the rockers are and the cam chain and valve springs..they look brand new..

[Buffalo Bill]

For as ugly as that engine is on the outside, the inside actually looks really good. The oil looks like it was changed yesterday. Check out how clean the rockers are and the cam chain and valve springs..they look brand new..

Yeah that pic came from a story about an AHRMA CB750 needing parts hours before the next race of the weekend. They said the same thing you did.
They stripped just of a couple rockers and springs.

[GregT]

The SOHC CB750 or 650 both have my attention. Like to try some vintage racing, the SOHC valve system looks really cool.

Looks cool, hard to set up right. Cam timing changes with the valve clearances as the contact point moves around the cam. You've got to set up the cam at running clearance to get it right. Then every time it's stripped, it's retime the cam again as valve stem height changes the timing again...
Then there's all the 6mm screws and studs holding the rocker pedestals and the cover onto the head. My personal record is 10 helicoils needed on an otherwise tidy customer motor.
There are a lot of easier motors around.

[Buffalo Bill]

Looks cool, hard to set up right. There are a lot of easier motors around.

Easier motors of that period? I'd like your opinion. For vintage racing I'm only interested in 4s of 650 & 750cc, 1975-81.
Also, the lightest bike after strip down.
Thanks!

[Buffalo Bill]

Fixing the cracks…

Working on the panels now. I used Larry's plastic epoxy method, plus some fiberglass cloth on a high stress crack.
Used a Dremel with a tiny steel burl to clean up the cracks.
Lot of deep scratches to fill.

PS: Got an email from an AHRMA member of the 2nd Generation Superbike rules committee about the eligibility of my bikes, (GSX750F Katana, and CBR600F1) :
"The 600cc are not allowed yet. They are working on a class for it on the future.I'm going to call them about the Suzuki. I see no reason it shouldn't be allowed.
I'll get back to you on that.
Thank you!"

[Buffalo Bill]

Started sanding, looking for body filler. Not surprised to find all this, it is a 32 yo sport bike.

left plastic, right fiberglass

[GregT]

Easier motors of that period? I'd like your opinion. For vintage racing I'm only interested in 4s of 650 & 750cc, 1975-81.
Also, the lightest bike after strip down.
Thanks!

kawasaki Z650. I built one for a customer a couple of years back. Z1 front end with twin discs - wire wheel too - std drum rear. Z1 carbs - same spacing, just had to rejet. Dyna S of course. Where it went off your target was the 750 top end i found and fitted.Std 750 cams on 106/108 lobe centers. Shim under bucket as standard too. I made up a 4:1 pipe using rusty Z1 headers the owner had lying around.

Finished up light and good handling with very good HP. The owner wasn't the greatest rider but every time out finished up in a group with the same two TZ350 yamahas - ridden by ex national Champs too, LOL.

With our tight tracks it needed the twin disc front. You may not - or if the rules allow, a bigger disc would help.

[Buffalo Bill]

rebuilding corners

Some panel corners are gone. I rebuilt them with multi layers of fiberglass cloth and Extra Working Time Epoxy, by Loctite.
Need the epoxy resin to saturate the fabric before it begins to cure.


Repaired corner-Left, normal corner-Right

[Buffalo Bill]

kawasaki Z650. I built one for a customer a couple of years back. Z1 front end with twin discs - wire wheel too - std drum rear. Z1 carbs - same spacing, just had to rejet. Dyna S of course. Where it went off your target was the 750 top end i found and fitted.Std 750 cams on 106/108 lobe centers. Shim under bucket as standard too. I made up a 4:1 pipe using rusty Z1 headers the owner had lying around.

Finished up light and good handling with very good HP. The owner wasn't the greatest rider but every time out finished up in a group with the same two TZ350 yamahas - ridden by ex national Champs too, LOL.

With our tight tracks it needed the twin disc front. You may not - or if the rules allow, a bigger disc would help.

Thanks! Priceless!
My target class is Vintage Superbike Middleweight (550-650cc, 1976-1981) Looks like Kawasaki is THE brand for aftermarket cams and Wiseco piston sets.

[GregT]

Thanks! Priceless!
My target class is Vintage Superbike Middleweight (550-650cc, 1976-1981) Looks like Kawasaki is THE brand for aftermarket cams and Wiseco piston sets.

Surprisingly for one of my builds, everything used except the Dyna was of kawasaki origin. Std 750 cams and pistons. 750 rods on the 650 crank - they use bigger rod bolts but are dimensionally the same. 650 cam sprockets on the 750 cams. 650 uses roller camchain, 750 uses Morse type.
It was actually a pretty cheap build. I picked up the 750 stuff locally from an engine that had done the crank. The owner was a Z1 nutter and had the front end and carbs in stock. He tossed the rusted Z1 headers to me and asked if they were any use. I made a collector and tailpipe using an aluminium aftermarket muffler. Two crossbraces put in the frame. One in front of the motor, one above the swingarm pivot. Seemed to be all it needed.
The OE 650 carbs even finished up cut and narrowed and used on a big CB350 four (465cc) for the same owner.