Topic: Purple Rain Bill's CB750/900 Turbo 1972

[Bill/BentON Racing]

    Always busy,no spare time....ok,a little here and there.! Been busy,so far,well,I'm glad I've been working on it....in my "sparetime"!lol!! Bill

What it looks like underneath.

Martek coils and I added lines and can,his line way short and vented to atmosphere! Better fuel filter

Tail section,one bolt to remove!K

Getting there,new oil press gauge.

Still gotta touch up engine this side.

Cleaner,nicer w/out blue grips,added h/bar end weights

PRPLRN on the way!!

Added heat shield and allen bolts

GSXR 750 tach and MPS tether kill and of course Falcon key fob!!
Adjusted valves and cam chain.....damn glad I did,all over the board,#2 intake couldn't get a .002 under,but could get .0015,barely! #1 was also way too tight,he messed up intakes,others .003 or .004.Ex were up to .008.He said mild cam,I went .004 and .006.Gonna run better and quieter.Gotta a f/fender coming to paint to match rear tail section.1983 CB650SC,like on Samauto and Calendar Girl(it runs fine now).F wheel a little outa round.Eventually will match rear,but Buchannons wants $204.00 for rim and $97.00 for spokes....too rich for me rt now. ::)Later and HAPPY THANKSGIVING!!!! Bill

[POPS 911]

BILL : Got a long swing arm= will measure on my stock CB750 F-ARM to see if this square tube swing arm will fit.  You can have plates welded on for your shock to bolt on to get the squat.  SEND pictures next week after holiday weekend.  Got spoke and mag wheels from 5 HONDAMATIC'S = WILL THEY WORK ??

POPS BK911

[Jerry Rxman Griffin aka MuthaF'er]

Bill,

Would be nice if you could order a wheel from Honda for half that price and have them ship it directly to Buchanons.

[Bill/BentON Racing]

POPS,thanks.Let me know.Bill.....Jerry,would be nice!Sounds so much better with new 40wt oil Castrol and BG EPC and valve and cam chain adj.Tach working now.Why did it have to drop 20 degrees? More later.

[Jerry Rxman Griffin aka MuthaF'er]

Don't know about that weather thing in the fall in Georgia??! Cold and damp! 70 degrees in Colorado and clear DRY skies. Humidity is kinda high though at 20%. 

[dragracer]

Purple Rain or Purple Haze, blink your eye and its gone.
Good checks so far Bill.

[Bill/BentON Racing]

Frank,thanks.Too damn cold to ride! But it's come a long wasy in 2 weeks!
This time 2 weeks ago,1st pass!..about 30 degrees WARMER! Bill

[Greggo]

That's a good lookin' one Bill Inspiration to put a 550 Rajay together.

[Bill/BentON Racing]

Now that's a project we'd all keep up with!! Go for it!!! Bill We put the Droiun supercharger on the little 550 but never got it going! 

[BLUE71TURBO]

Frank,thanks.Too damn cold to ride! But it's come a long wasy in 2 weeks!
This time 2 weeks ago,1st pass!..about 30 degrees WARMER! Bill

                 Bill, ya gotta get rid of that blue can !  Run the lines behind the turbo and put the can behind the engine above the swingarm pivot.       How loud is that short exhaust pipe ?   

[Sam Green Racing]

Strangely enough, it's quite quiet. 

[voodooracer]

Turbos make GREAT mufflers, (among other things!). Nice clean-up, Bill.

[Bill/BentON Racing]

Yes,Jon,it's got to go(temp)!  ;)Jon,thanks for the PM and advice.I'll be in touch! Yes,actually pretty quiet! Bill

[POPS 911]

BILL: That square tube swing arm [ with built in AIR TANK ]  I have is 8" over length and has the 16mm hole for front mount [ helps with twisting at high torque ] as the stock CB750F has only a 14mm front bolts and nut [ which was a big problem on the TURBO KZ'S ZIR'S 1978, on boost on the freeway it took you into the next lane over twisting the frame ] sold that bike the next day. But you can use your stock 20mm rear axle and spacers as the width is the same as the stock F swing arm.   I will send you many pictures of carbs and swing arms.

POPS BK911

[Bill/BentON Racing]

  POPS,thanks,looking forward to seeing them.Bill
Turbo's hard on rear dampers!

Fender ready for paint,braided line ready to install.

You reckon a chain ever came off?

New EK 530 DRZ2 on the way!
46 tooth going on,has 41 now! ;)60 ft getting better!
Rubber dampers off to batcave!!

[BLUE71TURBO]

 Rear dampers !  Rear dampers !   We don't need no REAR DAMPERS !   

[BLUE71TURBO]

Frank,thanks.Too damn cold to ride! But it's come a long wasy in 2 weeks!
This time 2 weeks ago,1st pass!..about 30 degrees WARMER! Bill

                 Looking badass my turbo brother !!    

[Bill/BentON Racing]

Well,there was this guy with a 71 blue one,and then my buddy Jim got one! What was a man to do? Sell his NS400 and buy a TURBO!!! Damn glad I did! Thanks for the inspiration...you two!!!!!
Thinking about checking out a F tank....boy, bet that starts y'all up! ...it would be purple!!! Bill

[Jerry Rxman Griffin aka MuthaF'er]

Bill, didn't I see a parachute at Valdosta?! 

[dragracer]

That long arm Pops is offering along with a new lockup just might see this bike go in the 9 second zone.

[Bill/BentON Racing]

  9 sec zone...unchartered territory!!! Bill

[POPS 911]

BILL: That rubber is 38 years old = trick we did on KZ's, put the rubbers back in their holes and fill in with clear or black silicone to all the gaps right up to the top of hub.   No moving around [ like the solid rear wheel on a PRO-STOCK BIKE or any fast after market race wheel ] then push in the drive hub while silicon is wet, clean off the squeezed out silicone and make sure the axle hole is clear. After silicone dries in wheel housing you now have a solid rubber- silicone cush drive wheel. Years ago a fellow came to all the IDBA races with sprockets for sale that had a rubber built in = to take the shock on launch of big motor KZ and Suzuki drag bikes with solid mount rear wheels.. If you think I'm kidding about that 14mm swing arm bolt and nut letting that frame twist, go up on the freeway [ with no cars in sight ] and while rolling along in 2nd gear wick that bad boy up and power shift into 3rd gear = hang on BILL.  Bigger GRADE 8 or AIRCRAFT  bolts and nuts are always better on a drag bike as the stock bike was made to ride the speed 55-65  limit , at 140mph that 38 year old down tube frame might-b-a-twisting, under boost.

POPS BK911

[Bill/BentON Racing]

POPS,new or used,that's a pretty good idea! Makes sense to me.Dropped off fender @ bodyshop for paint today! Chain should be here by Thursday along with better weather!Probably put those ceramic bearings I bought in front hub if they're the same. Bill

[POPS 911]

BILL:  Get a steering stabilizer for those small front forks as when that thing wicks up and tank slaps at 130-140 MPH it could cost you a lot = small price to pay for safety.  One hang up of that throttle cable under boost and you better have a landyard kill switch, oh #$%*, tach pegged. BANG!!!!!
I'll send you a note how to make a non-wheelie switch from a BUSA TIP OVER SWITCH. No-one should get hurt or killed following their dreams on two wheels = seen a few close friends make that last ride........

POPS BK911

[Bill/BentON Racing]

POPS,I put on a MPS tether,but had forgotten about damper! Thanks,it'll have them both.Bill