Topic: 750K2 Hot Rod Revival - Early Christmas

[PeWe]

I do not think that is copper completely. Ordered from Slingshot  (forum member here) while in business 4 years ago.

Thanks for the heads up. No problem to replace with Honda equal later on if these are soft copper.
Update: I had a ride today, brake lines are hard, not copper soft

[CBJoe]

Thanks all...gave me some things to think about for wheels and brakes. 


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[PeWe]

Dual brakes is an important upgrade for a modified CB750.
I understand now why some replace the frontend for brakes and wheel size.

[CBJoe]

Today was the first time this year where I got out and actually did some riding for fun.  Man this thing is a blast to ride.  Still no smoke, so I'm hoping its good for the long haul.  I installed a remote idle adjuster on the RS34s to help with the starting....now I can let it run high idle till warm and then easily turn it down. 

Just little things to tinker here and there...but hopefully just doing a lot of riding this year.

[andy750]

Congratulations Joe! Looking forward to some great ride reports!

[CBJoe]

Congratulations Joe! Looking forward to some great ride reports!

Thanks Andy...it sure was nice to ride it for fun and not testing post issue   I'm sure theres some further quirks to shake out...but for now all seems well.  Trying to decide if I'm going to mount some rearsets to tweak the riding position.

[PeWe]

Bike is now where it belongs, on the road!
Always extra fun to have something to test or just enjoy the latest work spent on the bike.

[Jerry Rxman Griffin aka MuthaF'er]

Great news Joe!!!!!

[SOHC4 Cafe Racer Fan]

Nice!!

Just so I don't go out of my mind, who was the prior owner -- I remember there was a good build thread on this one.

[Jerry Rxman Griffin aka MuthaF'er]

Sparty

[andy750]

Sparty learning from the master as the K2 Hot Rod engine is put together

[CBJoe]

Sparty

Yessir...was great to meet Art and give the bike a new home a few years ago.  I've left the engine and suspension alone but have done a refresh on the following

- Full Rewire with M-Unit, ricks R/R, and LED lighting all around
- RS34s
- CB400 Handlebars with Messnermoto Controls. tapered bearings and overall triple tree repair and hardware.

General Tune and tweak all around.  Wheels and brakes will be the next on the to-do...but not for a while.  I've spent too much money on bikes in the last few years...wifes turn next.

Currently shopping for an early-to-mid 70s Pontiac firebird for Rose(Wife)....that way we can trailer the honda to events and I can ride and she can drive

[PeWe]

Really shining engine!
I doubt that they looked that good at the Honda assembly line back in the days in Japan.

[SOHC4 Cafe Racer Fan]

Sparty! That's right.

Yeah, I remember Art got to work with and learn from JMR himself.  Mike is such a great guy.

I'm so glad this bike is back in action.

[johno]

Re the smoke saga, I know its old news now but I just read through the thread and many moons ago had a similar experience, in my situation it was the oil tank anti drain valve stuck, drained the oil tank into sump and emptied the oil tank for a few minutes, crank whipped up a storm of oil, smoked like a cigar, caught my attention, I panicked stopped the bike, found the oil tank empty so figured all the oil was in engine, rode home smoking but slowly getting less, by time got home, no smoke, oil tank full, the world was a better place and I never fixed anything and never happened again 

[CBJoe]

Re the smoke saga, I know its old news now but I just read through the thread and many moons ago had a similar experience, in my situation it was the oil tank anti drain valve stuck, drained the oil tank into sump and emptied the oil tank for a few minutes, crank whipped up a storm of oil, smoked like a cigar, caught my attention, I panicked stopped the bike, found the oil tank empty so figured all the oil was in engine, rode home smoking but slowly getting less, by time got home, no smoke, oil tank full, the world was a better place and I never fixed anything and never happened again 

hmm...could be.  But I did drain and replace the oil with new after it started smoking to no avail.  But this was all while idling....I'm just happy its gone!

[PeWe]

Parked on sidestand so oil could flow more to the left, higher oil level at top, enter via guides?

I think this was mentioned earlier.

I have thanks to oil pressure gauge found the no good idea to start bike and let it warm up parked on sidestand.
Oil pump will not suck oil enough when leaning to left to pump back to oil tank.

I saw how pressure suddenly left cold 70-80 PSI to pump between 20-0 PSI.  Either 20 or 0.
No oil warning. Checked tank and almost empty.

I do not let it idle on sidestand anymore. Straight up with me on it. Oil level as it should. Seen on both my CB750.

[MRieck]

Sparty

Yessir...was great to meet Art and give the bike a new home a few years ago.  I've left the engine and suspension alone but have done a refresh on the following

- Full Rewire with M-Unit, ricks R/R, and LED lighting all around
- RS34s
- CB400 Handlebars with Messnermoto Controls. tapered bearings and overall triple tree repair and hardware.

General Tune and tweak all around.  Wheels and brakes will be the next on the to-do...but not for a while.  I've spent too much money on bikes in the last few years...wifes turn next.

Currently shopping for an early-to-mid 70s Pontiac firebird for Rose(Wife)....that way we can trailer the honda to events and I can ride and she can drive

73 to 75 Trans Am would be the bomb. I had a 67 326 HO bird when I was a kid. Always loved the hood tach.

[CBJoe]

thats spot on Mike...we've been watching the '70-76 Models.  Rose had a 76 in high school. 

We're currently eyeing a '74 Formula 455 with a Turbo400 Auto.  Love the hog nosed hoods on the ram air versions.

[PeWe]

Line this?
https://www.streetmusclemag.com/news/ebay-find-of-the-day-74-sd455-formula/

There are lots of nice cars in barns  and peoples garages just waiting for you!

[CBJoe]

Similar PeWe....but I cant afford a Super Duty   Those are very much more expensive.

Well...I spoke too soon.  Smoke returned today (oil still in reservoir so not draining to sump).  Same as before.  Slowly started smoking at idle while warming up.  After about 20mins of riding smoke is gone.  I'm assuming valves or guides. I dont have time today to troubleshoot, but soon I'll pull the plugs and do a cold compression check to try and narrow down whats going on.

Still sounds and rides great.  Even the starter clutch is behaving.

Joe

[Jerry Rxman Griffin aka MuthaF'er]

Well #$%* Joe!

[CBJoe]

Well #$%* Joe!

Haha!  You can say that again Jerry   I've got my Bonneville apart on the lift for a major service.  So I'll toss the Honda up there after I finish it.  Good thing is my guzzi is tip top at the moment so I've still got wheels.

[CBJoe]

Whelp....Found the culprit for smoking.   Cylinder #3 not looking so pretty   Will take a closer look when its on the bench.






Other cylinders look ok




At least now I know I'm not doing this next phase for nothing.  Will be a longer term build, but we're going bigger.  Head will be going back to Mike for repair and a workover so that it can pair well with one of his Billet Blocks 

Plans:
- JMR 1000CC billet Block - Discussing with Mike...haven't settled on specific pistons yet. 
- Cleanup and and reinforce the frame
- CALFAB swingarm from motogpwerks....already had some communications with Chris
- New Wheels with rear disc conversion and front end upgrade.  Currently thinking of the goldwing fork route.  Still researching

And I'm sure more....Tearing it down now.

Cheers, Joe

[Jerry Rxman Griffin aka MuthaF'er]

I've had problems twice with #3 in the 900. I suspect oil blockage in the crank. Neither time were the stopper balls removed (that I am aware of) to clean the oil passages then replaced with the (?)grub screws.