Author Topic: Bonneville Turbo CB500/550 (Read 84952 times)

Sam Green Racing · « **Reply #200 on:** December 23, 2012, 05:12:33 AM »

MPS-BG Foil Hat Racing Honda 08/11 120.507

Might be the one to chase Gregg.

Sam.

Greggo · « **Reply #201 on:** December 23, 2012, 06:42:29 AM »

Quote from: Syscrush on December 22, 2012, 10:01:25 PM

Quote from: Greggo on December 22, 2012, 08:22:05 AM
Well, I don't mind all this top speed talk, because I'm pretty much convinced this bike (yea, back to my bike now ) was/is capable of that 175.813mph record...which still stands for its class
I sure hope so, it would be awesome for you to put this bike in the books!

Sys, I think this is the bike that already holds that record

Greggo · « **Reply #202 on:** December 23, 2012, 06:44:00 AM »

Quote from: Sam Green Racing on December 23, 2012, 05:12:33 AM

MPS-BG Foil Hat Racing Honda 08/11 120.507

Might be the one to chase Gregg.

Sam.

Aw, come on Sammy!! I think it did/could do better than THAT

Sam Green Racing · « **Reply #203 on:** December 23, 2012, 04:12:37 PM »

Gregg, you really do need to check on the classes and what the letters mean.
I'm almost sure that the class you quoted is not a production class as such. APS-BF.
A is altered which I think refers to the chassis. PS is partial streamlined. B is supercharged or turbocharged. F refers to the type of fuel the bike runs on, in this case it is Nitro not pump gasoline. Alcohol and Nitrous might come into the equation as well.
A good person to ask is Keith Turk, not only does he know more about LSR than most, he is also a CB500 freak.

He's not been on here for some time but it might be worth shooting him a PM, here's his profile. http://forums.sohc4.net/index.php?action=profile;u=5583

Sam.

Greggo · « **Reply #204 on:** December 23, 2012, 04:39:06 PM »

Sam, thank you for all the info. I had been basing the 'A' on the lengthened/altered swing arm. I believe the bike had a fairing on the front, evidenced by the mounts...that's where I get the 'PS' from. The bike has a turbocharged fuel engine with some kind of special injection...either alcohol or water, therefore the 'BF'.

There's far too large a gap in ownership history to prove anything about this bike.

Greggo · « **Reply #205 on:** February 13, 2013, 02:17:00 PM »

I need some carburetor opinions for street use. Is 32mm a decent size, or too big for the street with a 550? Also, should I go flat, or round slide. I'm finding Mikunis on ebay for about $100, but there's all sorts of combos, so I'm not sure which direction to go.

geminimotors · « **Reply #206 on:** February 13, 2013, 03:40:39 PM »

How 'bout a little SU?

ivanhoew · « **Reply #207 on:** February 14, 2013, 12:29:02 AM »

gregg ,

on my 400/4 , i used a stromberg , bit like an su but with a rubber diaphragm around the piston . it worked ,but the piston rise from tickover to 4000 rpm was about 5mm ,so not much metering adjutment on the needle profile available .
i then went to a yamaha xs650 twin cv carb , maybe a 32mm can't rmember , this worked well ,but max flow through it with the stock petrol tap ,was about 60 bhp .then lean . fitting a high speed enrichment ,gave me 85 bhp at 8500 then clutch gave up .i think for prolonged use at that sort of power and above i would need a much bigger tank tap .but the carb was good ,and gave me 45 to 50 mpg.

regards
robert

fastbroshi · « **Reply #208 on:** February 14, 2013, 04:52:12 PM »

I'd imagine the diameter would have to be somewhat bigger given that stock, each cylinder had a 22mm carb bore to breathe through. If it even idled wouldn't it severely limit the top end? There's that other member here with the yellow framed, turboed 550. Pick his brain and see what he's got.

Greggo · « **Reply #209 on:** February 14, 2013, 05:01:12 PM »

Quote from: fastbroshi on February 14, 2013, 04:52:12 PM

I'd imagine the diameter would have to be somewhat bigger given that stock, each cylinder had a 22mm carb bore to breathe through. If it even idled wouldn't it severely limit the top end? There's that other member here with the yellow framed, turboed 550. Pick his brain and see what he's got.

Bob3050 has a different sized turbo, the one that came with the ATP kit back in the 70's...I think he has the bendix zenith carb that came with the kit..not sure what size they were, but they were modified with bigger jets, and a larger float bowl.

Greggo · « **Reply #210 on:** February 19, 2013, 03:59:05 PM »

I am going to have another go with the carburetor on this bike. I have to get a custom throttle cable made, and install the Yoshi magneto system...Then, this bike will purr once again

Terry in Australia · « **Reply #211 on:** February 20, 2013, 02:19:00 AM »

Quote from: Greggo on February 19, 2013, 03:59:05 PM

I am going to have another go with the carburetor on this bike. I have to get a custom throttle cable made, and install the Yoshi magneto system...Then, this bike will purr once again

G'Day Greg, most motorcycle shops (and bicycle shops, for that matter) will sell you a "universal cable kit", which consists of a length of cable that you cut to size, and a couple of different brass "lugs" that you solder on to the ends.

I haven't bought one for a couple of years, but they used to be around 10 bucks here in "Rip Off Land", so probably only a couple of bucks in the US? Cheers, Terry.

Scotty J · « **Reply #212 on:** February 20, 2013, 05:01:31 AM »

Subscribed. Quit your job and entertain us with regular updates on your progress.

Stev-o · « **Reply #213 on:** February 20, 2013, 05:24:03 AM »

Quote from: Scotty J on February 20, 2013, 05:01:31 AM

Quit your job and entertain us with regular updates on your progress.

Now, there's a great idea! We all want to do that.

Greggo · « **Reply #214 on:** February 20, 2013, 05:38:58 AM »

Quote from: Terry in Australia on February 20, 2013, 02:19:00 AM

Quote from: Greggo on February 19, 2013, 03:59:05 PM
I am going to have another go with the carburetor on this bike. I have to get a custom throttle cable made, and install the Yoshi magneto system...Then, this bike will purr once again

G'Day Greg, most motorcycle shops (and bicycle shops, for that matter) will sell you a "universal cable kit", which consists of a length of cable that you cut to size, and a couple of different brass "lugs" that you solder on to the ends.

I haven't bought one for a couple of years, but they used to be around 10 bucks here in "Rip Off Land", so probably only a couple of bucks in the US? Cheers, Terry.

Thanks Terry. After posting that, I got to searching on ebay for universal cables, and found just what I need. The carb slide has a slot for the enlargened end of a cable, like the K0 carbs have, and the Tarozzi grip end accepts a ball, unlike most Hondas that take that 'barrel'. I found what I needed for $11, so, SCORE

Greggo · « **Reply #215 on:** February 20, 2013, 05:48:09 AM »

Quote from: Stev-o on February 20, 2013, 05:24:03 AM

Quote from: Scotty J on February 20, 2013, 05:01:31 AM
Quit your job and entertain us with regular updates on your progress.

Now, there's a great idea! We all want to do that.

I could turn it into a job...but then I'd have to sell 'em

chris mcshifty · « **Reply #216 on:** February 20, 2013, 11:37:33 AM »

Quote from: Stev-o on February 20, 2013, 05:24:03 AM

Quote from: Scotty J on February 20, 2013, 05:01:31 AM
Quit your job and entertain us with regular updates on your progress.

Now, there's a great idea! We all want to do that.

No kidding but this looks like a great build so far

Greggo · « **Reply #217 on:** February 22, 2013, 04:25:51 PM »

Well, since my company hasn't made any money yet

I still have to work my day job

BUT, I get a few hours this Saturday to spend on bikes at the shop, and I'm planning to focus on this one. Also, since I've decided this bike will hit the street this summer, I will have to spend some time doing some of those boring things to get an old bike back on the road.

To Do:

Stock length swing arm
Wheel bearings
Steering bearings
Front brakes
Rear brakes
Chain
Clutch cable
Uber simple electronics...probably just a battery that will power a few LED lights for daytime riding...No charging system...(more thought will need to put into this, and advice is appreciated)

I'll get done what I can, and take some pics of the progress. It will have a different tank until I get the taps on the Benelli tank sorted.

Greggo · « **Reply #218 on:** February 23, 2013, 02:48:10 PM »

Rolled it back into the shop today...

Removed the rear wheel...

Definitely have clearance issues here for a throttle cable...hmmm.

How I left it...I threw on the KONI shocks that need a rebuild, and I have a stock length swing arm ready to go.

Sam Green Racing · « **Reply #219 on:** February 23, 2013, 03:53:13 PM »

This thread should be in the hipo forum young Gregg.

Sam.

Greggo · « **Reply #220 on:** February 23, 2013, 04:31:46 PM »

Quote from: Sam Green Racing on February 23, 2013, 03:53:13 PM

This thread should be in the hipo forum young Gregg.

Sam.

I'm okay with that Sam

can you move it on over?

Sam Green Racing · « **Reply #221 on:** February 23, 2013, 07:05:07 PM »

No not me, but I'm sure Bob will if you ask him.

http://forums.sohc4.net/index.php?action=profile;u=2

Sam.

Stev-o · « **Reply #222 on:** February 24, 2013, 06:43:14 AM »

Greggo - will you rebuild the Koni's? I have an old set too and not sure what to do with them?

Greggo · « **Reply #223 on:** February 24, 2013, 07:48:52 AM »

Quote from: Stev-o on February 24, 2013, 06:43:14 AM

Greggo - will you rebuild the Koni's? I have an old set too and not sure what to do with them?

Yes I will, but I have to find the right spanner tool to get them apart. I tried, and failed miserably yesterday. Currently getting some help from member 'fire113' AKA Georg from Germany, as he's rebuilt a few sets, and is sending me a pic of the tool he uses.

195suz · « **Reply #224 on:** February 24, 2013, 09:14:22 AM »

If your having clearance issues withe cable Dellorto sells a 90 degree elbow for the top of the carb.

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Author Topic: Bonneville Turbo CB500/550 (Read 84952 times)