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Old 06-20-2012, 04:51 PM   #61
FreeTheBeast OP
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Laugh Dels

Quote:
Originally Posted by supershaft View Post
First thing? Remove the Bings!
I'd love some Delortos. One day perhaps. First order of business will be cylinders, pistons, heads, exhaust, and brakes. I don't think a sport cam replacement will be done this time around. Will definitely tune it on a Dyno. Max (MAX BMW) is helping me out with all this stuff. He has a Dyno at one of his shops.
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Old 06-20-2012, 06:52 PM   #62
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Quote:
Originally Posted by FreeTheBeast View Post
I'd love some Delortos. One day perhaps. First order of business will be cylinders, pistons, heads, exhaust, and brakes. I don't think a sport cam replacement will be done this time around. Will definitely tune it on a Dyno. Max (MAX BMW) is helping me out with all this stuff. He has a Dyno at one of his shops.
I am just trying to help and carbs are tied with a cam as far as the biggest bang for the buck is concerned.

If I was racing a beemer I would put on a quick pull real throttle too. Our stock throttles are slop kings and twisting that sucker wide open is too much for the race track! IMO, they are junk as far as the race track is concerned. Nothing makes it damn near impossible to ride smooth and fast like a sloppy mile wide turn throttle! I am just trying to help and good luck!!

When I was a little kid back before many race bikes had real race throttles, that was one of the first things we did to a bike.
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Old 06-20-2012, 07:29 PM   #63
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Leave the Bings for now. I would do it in this order

1. BMW Sport Camshaft
2. BMW Sport Pistons
3. Carbs- 38mm Dellorto's or 36mm Mikuni's.
4. Head Work
5. Exhaust

..and I'm sure you have already removed the cylinder base gaskets
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Old 06-20-2012, 07:31 PM   #64
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Cam, carbs and throttle are a good start. Hi comp 750 pistons can be tricky to find so barrel skimming and piston pocketing may be a good start.
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Old 06-20-2012, 08:00 PM   #65
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Is there a regulation on fender size for racing? I ask because I would think you'd want a little more coverage over the top of your front wheel. As is, it's sticking kinda far up, but the top of your tire is moving twice as fast as you are. I read a report on someone taking a bicycle in a wind tunnel with an extendable fender. Slidding it forward reduced drag from a 32mm wide tire going maybe 20mph. Imagine what it would do for a 100mm wide tire going 100mph!
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Old 06-20-2012, 08:06 PM   #66
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Originally Posted by mykill View Post
Cam, carbs and throttle are a good start. Hi comp 750 pistons can be tricky to find so barrel skimming and piston pocketing may be a good start.
That is why I designed my own piston 18 years ago after I bought the last of the factory BMW Sport pistons. No base gasket, 46mm intake pocket and 10.5:1 compression:)
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Old 06-20-2012, 08:56 PM   #67
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next vintage race?

missed the loudon classic this year, when's the next vintage race at nhms?
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Old 06-20-2012, 10:12 PM   #68
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Quote:
Originally Posted by supershaft View Post
If I was racing a beemer I would put on a quick pull real throttle too. Our stock throttles are slop kings and twisting that sucker wide open is too much for the race track! IMO, they are junk as far as the race track is concerned. Nothing makes it damn near impossible to ride smooth and fast like a sloppy mile wide turn throttle! I am just trying to help and good luck!!

When I was a little kid back before many race bikes had real race throttles, that was one of the first things we did to a bike.


I use a Yamaha TZ throttle. It's twin pull and opens 40mm dels in 90 degrees. Just right. Domino make a replica I think.
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Old 06-20-2012, 10:15 PM   #69
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Quote:
Originally Posted by bmweuro View Post
That is why I designed my own piston 18 years ago after I bought the last of the factory BMW Sport pistons. No base gasket, 46mm intake pocket and 10.5:1 compression:)


I thought I got the last pair :)
They look like this.
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Old 06-20-2012, 10:43 PM   #70
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Quote:
Originally Posted by mykill View Post
Cam, carbs and throttle are a good start. Hi comp 750 pistons can be tricky to find so barrel skimming and piston pocketing may be a good start.
Your still running single plugged right mk?
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Old 06-20-2012, 11:32 PM   #71
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Quote:
Originally Posted by pommie john View Post
I use a Yamaha TZ throttle. It's twin pull and opens 40mm dels in 90 degrees. Just right. Domino make a replica I think.
Great tip pj!
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Old 06-21-2012, 03:31 AM   #72
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I run a Tommaselli twin pull on my bike with some 36mm Dells off a Ducati, friend of mine made up some new head inlet stubs as the head is 36mm ID on the R90 heads.
I was running a K and N filter in the stock position, then no filters now 60 mm bellmouths.
Next its fit my new programmable ignition.

Bevel Heaven does the throttle, Dells,bellmouths etc, Steve is good to deal with. I have been unable to find better pricing on them.
Love you bike and the vid...well cool.
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Old 06-21-2012, 04:21 AM   #73
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this is a great thread, you really look as if you are enjoying yourself.

Charles
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Old 06-21-2012, 06:12 PM   #74
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Quote:
Originally Posted by noman View Post
missed the loudon classic this year, when's the next vintage race at nhms?
http://www.race-uscra.com/events.html

If my bike is ready, I'm also going to run it for the hill climb races in Vermont: Okemo Mt on July 6/7; August 4/5.

MAX BMW is hosting a hill climb at Ascutney on August 25/26. http://climbascutney.com/

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Old 06-21-2012, 09:20 PM   #75
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Originally Posted by supershaft View Post
Your still running single plugged right mk?
Yes.
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