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Motor build for "Yellow Bike III" http://www.ducatittandf1.com/viewtopic.php?f=24&t=10299 |
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Author: | loudbike [ Thu Jun 27, 2013 9:38 am ] |
Post subject: | Re: Motor build for "Yellow Bike III" |
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.... |
Author: | graeme [ Fri Jun 28, 2013 4:49 am ] |
Post subject: | Re: Motor build for "Yellow Bike III" |
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 |
Author: | brad black [ Wed Jul 03, 2013 7:12 am ] |
Post subject: | Re: Motor build for "Yellow Bike III" |
cool wish I had some money. |
Author: | 618F1 [ Wed Jul 03, 2013 9:47 am ] |
Post subject: | Re: Motor build for "Yellow Bike III" |
And I wish I could weld and machine like that! MikeV |
Author: | loudbike [ Fri Aug 23, 2013 4:17 pm ] | ||||||||||||
Post subject: | Re: Motor build for "Yellow Bike III" | ||||||||||||
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..
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Author: | archimedes [ Sun Aug 25, 2013 9:10 pm ] |
Post subject: | Re: Motor build for "Yellow Bike III" |
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? |
Author: | loudbike [ Sun Aug 25, 2013 9:43 pm ] |
Post subject: | Re: Motor build for "Yellow Bike III" |
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. |
Author: | loudbike [ Tue Sep 10, 2013 8:15 am ] | |||||||
Post subject: | Re: Motor build for "Yellow Bike III" | |||||||
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.
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Author: | Carlo [ Tue Sep 10, 2013 4:41 pm ] |
Post subject: | Re: Motor build for "Yellow Bike III" |
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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