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 Post subject: Re: Motor build for "Yellow Bike III"
PostPosted: Thu Jun 27, 2013 9:38 am 
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Joined: Sun Aug 08, 2010 4:37 pm
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Location: Ottawa, Ontario, The Great White North
Brad - I forgot to mention that you'll get to fool around with that motor after all. The bike is going to Basil Tambanis; who lives pretty close to you.

Small world - getting smaller by the day....

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 Post subject: Re: Motor build for "Yellow Bike III"
PostPosted: Fri Jun 28, 2013 4:49 am 
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Joined: Sun Nov 07, 2010 10:54 pm
Posts: 425
Location: Brisbane
That's an interesting inlet port shape Steve.
Does the floor flatten and curve down to the valve after the guide?
There's a lot of work there.
Graeme


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 Post subject: Re: Motor build for "Yellow Bike III"
PostPosted: Sun Jun 30, 2013 1:02 pm 
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Joined: Tue Oct 05, 2010 9:21 am
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My weekend fun is working a set of heads up for the TT1 project. Quite a bit goes into making those flat torque dyno sheets that Steve posted. Everything is scaled to the motor size cam choice and intended rpm. Here are some pictures from the set still warm from the weld bench.
-Cranky-


Attachments:
File comment: Pick some heads from the pile
P1010875.JPG
P1010875.JPG [ 3.95 MiB | Viewed 677 times ]
File comment: Milling out small seats.
P1010870.JPG
P1010870.JPG [ 4.02 MiB | Viewed 677 times ]
File comment: Preheated head is welded with special filler rod.
P1010876.JPG
P1010876.JPG [ 4.06 MiB | Viewed 677 times ]
File comment: Roughed out and ready to machine for bigger seats
P1010884.JPG
P1010884.JPG [ 2.03 MiB | Viewed 677 times ]
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 Post subject: Re: Motor build for "Yellow Bike III"
PostPosted: Wed Jul 03, 2013 7:12 am 
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Joined: Mon Jan 21, 2013 4:36 pm
Posts: 182
cool

wish I had some money.


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 Post subject: Re: Motor build for "Yellow Bike III"
PostPosted: Wed Jul 03, 2013 9:47 am 
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Joined: Thu Oct 14, 2010 11:23 am
Posts: 1151
And I wish I could weld and machine like that! MikeV


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 Post subject: Re: Motor build for "Yellow Bike III"
PostPosted: Fri Aug 23, 2013 4:17 pm 
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Joined: Sun Aug 08, 2010 4:37 pm
Posts: 361
Images: 6
Location: Ottawa, Ontario, The Great White North
More on the YBIII project.. I got side-lined by the Mosport event and then had some issues with the fairing (waiting for the replacement to come back from the painter), but aside from a few little detail bits, the bike's essentially done. Hoping to get it out to Grattan in 2 weeks and see what a 103 HP F1 feels like..


Attachments:
1987 Ducati 750F1 840cc YBIII ls.JPG
1987 Ducati 750F1 840cc YBIII ls.JPG [ 2.79 MiB | Viewed 518 times ]
1987 Ducati 750F1 840cc YBIII rs.JPG
1987 Ducati 750F1 840cc YBIII rs.JPG [ 3.15 MiB | Viewed 518 times ]
DSC08495.JPG
DSC08495.JPG [ 3.19 MiB | Viewed 518 times ]
1987 Ducati 750F1 840cc YBIII tank front.JPG
1987 Ducati 750F1 840cc YBIII tank front.JPG [ 2.63 MiB | Viewed 518 times ]
1987 Ducati 750F1 840cc YBIII rs rear.JPG
1987 Ducati 750F1 840cc YBIII rs rear.JPG [ 2.85 MiB | Viewed 518 times ]
1987 Ducati 750F1 840cc YBIII rs motor.JPG
1987 Ducati 750F1 840cc YBIII rs motor.JPG [ 3.13 MiB | Viewed 518 times ]
1987 Ducati 750F1 840cc YBIII motorls.JPG
1987 Ducati 750F1 840cc YBIII motorls.JPG [ 2.81 MiB | Viewed 518 times ]
1987 Ducati 750F1 840cc YBIII dash.JPG
1987 Ducati 750F1 840cc YBIII dash.JPG [ 2.99 MiB | Viewed 518 times ]
1987 Ducati 750F1 840cc YBIII coils.JPG
1987 Ducati 750F1 840cc YBIII coils.JPG [ 2.96 MiB | Viewed 518 times ]
1987 Ducati 750F1 840cc YBIII caliper.JPG
1987 Ducati 750F1 840cc YBIII caliper.JPG [ 2.73 MiB | Viewed 518 times ]
1987 Ducati 750F1 840cc YBIII  triple.JPG
1987 Ducati 750F1 840cc YBIII triple.JPG [ 2.81 MiB | Viewed 518 times ]

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 Post subject: Re: Motor build for "Yellow Bike III"
PostPosted: Sun Aug 25, 2013 9:10 pm 
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Joined: Sat Nov 13, 2010 5:39 pm
Posts: 23
Images: 21
Location: harrisonville, missouri
Steve,

never ceases to impress me the attention to detail
from your efforts. really appreciate the pics digging
into the beast's belly . . . . . i am a fan of how those
little components make for a well mannered finality.
so, curious on one of those details is my interest on
your engine coating ---- powder coating it doesn't seem
to be as the finish is well balanced due to a light touch.
and the color is not too dull or too bright.
coming from Palmer's 1st post i think prep work was
excellent, can you describe your finish on the engine for
my interests?


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 Post subject: Re: Motor build for "Yellow Bike III"
PostPosted: Sun Aug 25, 2013 9:43 pm 
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Joined: Sun Aug 08, 2010 4:37 pm
Posts: 361
Images: 6
Location: Ottawa, Ontario, The Great White North
archimedes wrote:
Steve,

never ceases to impress me the attention to detail
from your efforts. really appreciate the pics digging
into the beast's belly . . . . . i am a fan of how those
little components make for a well mannered finality.
so, curious on one of those details is my interest on
your engine coating ---- powder coating it doesn't seem
to be as the finish is well balanced due to a light touch.
and the color is not too dull or too bright.
coming from Palmer's 1st post i think prep work was
excellent, can you describe your finish on the engine for
my interests?


Now you're makin' me blush..

I've been doing my motors with Dupli-Color Engine Enamel (Low Gloss Black) for years. With the motor on my older Cycle Cat engine stand, I give the engine a good Varsol rinse and air blast dry - then fill a spray bottle with lacquer thinner and spray everything while air drying at the same time. Then I mask-off the bits that need to be masked, stick an electric heater under the motor, and cover with an old moving blanket for about 20 minutes. A quick blast with compressed air and hit it with 3 light coats as per directions on the can. Then I swap the fasteners and bolt the belts, manifolds, clutch, carbs and cam covers on. One heat cycle and the finish is bullet-proof.

Small chips can be feathered out with a rag and lacquer thinner on the early motors. Later (post-2000ish) cases have a different finish and require sanding to blend out chips and a more cautious touch with the lacquer thinner. That last motor (an 800) was a bitch; the factory finish was really soft and thick, took a lot of sanding (chips, etc) and didn't react well to the lacquer thinner..

Count on about 2.5 cans of paint for a motor.

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 Post subject: Re: Motor build for "Yellow Bike III"
PostPosted: Tue Sep 10, 2013 8:15 am 
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Joined: Sun Aug 08, 2010 4:37 pm
Posts: 361
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Location: Ottawa, Ontario, The Great White North
Palmer and I met at Grattan in Michigan last weekend where we burned a pail of race gas and dialed-in Yellow Bike III bike in preparation for shipment to Basil in OZ. Gary did the riding and was amazed at the power and torque. The thing's really, really fast We had sketchy weather with a damp track in the first sessions and again after lunch, but full dry and warm conditions in the afternoon. Grattan is a tight and fairly bumpy layout with a long front straight and plenty of elements that test the handling of a bike.. A little fiddling and handling is the same as the other two Yellow Bikes - nice turn-in, great mid-corner and finish. The fast class mostly Japanese liter bikes and the occasional Triumph as well as an HP2 BMW - and the bike didn't even give much away to the BMW. By the end of the day, Gary got up to 90% of his race pace - which is waaay faster than I can go and the bike remained composed. I have a couple of small issues to attend to: A bad seal behind the lower belt pulley, swap the sprocket nuts with a lower profile, fix a light fuel seepage at the fuel tap and give the bike a good cleaning. Gary was having a helluva time with wheel-spin coming out of the slower corners and we really shagged the rear tire.

Some of that's power/torque/weight and some is likely a spring rate set for the new owner that was making it hard to keep the rear wheel controlled. I'm sending my pics and settings to my tire and suspension guys to see what they say.

Gary loved it and I loved watching and listening.


Attachments:
DSC08722.JPG
DSC08722.JPG [ 2.77 MiB | Viewed 424 times ]
YBIII Garage.JPG
YBIII Garage.JPG [ 3.19 MiB | Viewed 424 times ]
YBIII Palmer.JPG
YBIII Palmer.JPG [ 3.18 MiB | Viewed 424 times ]
YBIII Plus HP2.JPG
YBIII Plus HP2.JPG [ 2.88 MiB | Viewed 424 times ]
YBIII Tea Cup.JPG
YBIII Tea Cup.JPG [ 627.7 KiB | Viewed 424 times ]
YBIII Pit Out.JPG
YBIII Pit Out.JPG [ 3.13 MiB | Viewed 424 times ]

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Steve Munro
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 Post subject: Re: Motor build for "Yellow Bike III"
PostPosted: Tue Sep 10, 2013 4:41 pm 
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Joined: Thu Oct 28, 2010 4:44 am
Posts: 1353
Images: 7
Hello Steve, I beg to give my opinion about the worn tire in a bad way.

To my humble opinion, it may be that the spring is too reactive, that is too harsh, hydraulics not working, but I believe that the fault is the drive chain is too tight, for this cause the bike is not lowered behind, since the chain tension, so no sagging, does not create traction and bounces like a ball.

Ciao Steve!!! Carlo.


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