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Discussion Starter #1
JohnnyB What size carbs are on Marys 175? Or- if stock 20mm will only accept 102 mains(on my bike) before they are entirely too rich can you move up a carb size to allow more air as well?

JD is your motor stock 175 internally too?
bd
 

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only modification is it's bored to 19?cc. oh, and for next year I hired Mighty Mouse to run on the wheel. watch out!
 

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Bill Fucking Douglas (hehe, every time I see your initials that's what I think of),

Ideal carbs for a close to stock bike in my opinion are Keihin 24mm carbs off a SL350 K1... the year with normal round slide carbs. This is what we use on Mary's bike.

Jets should be somewhere around 100 for a mildly tuned engine.

A better choice if you plan on doing more extensive mods in the future would be NEW Keihin PE24 race carbs. These are what I use on my bike. $95 each at Sudco, spigot mount, parts and jets are a breeze to get.

You'll have to make intakes though. I can supply the engine side flanges and bent 1.25" tube for a weld it yourself kit. Although I'd have to have a couple of people want them cause I'd have more made up and even that may not be possible for a while cause they people that made my last batch seem to be having a problem of some sort.
JohnnyB
 

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quote:
Bill Fucking Douglas (hehe, every time I see your initials that's what I think of),
haahaa, me too. all because of the BFI (Big Fucking Indian) in Freeport. and because I used to use JfuckingD as my name in quake.

oh yeah bikes, I'll be using larger carbs this year. ala aaron phinney, master tuner of japanese bikes with amal carbs.
 

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Discussion Starter #6
I don't know nothing about no lingus but the "F" is not the middle initial my parents gave me. The top tube of my raceing bicycle was personalized with billyfuckindouglas quite a while ago.

I'd be interested in the intake kit. I do have a set of those 24's collecting dust in the basement. Anyone else need a set so we can coax JohnnyB to make some? Anyone?
OK I'll buy 2 sets if I have to
 

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i was planning on a set too, as I'm getting the big carbs. So there, JB, now ya gotta make at least 4 sets.

And BFD, you gotta ge the brake stay too.

68 fukin grams

s
 

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Discussion Starter #8
that brake stay looks dead sexy


perhaps JB can start his own 'Screaming Eagle' style of performance catalogue. Maybe 'Upset flightless water fowl' or something similar. That's up to the focus groups and marketing dept.
 

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Scott,
Check your scale... I've got that stay at something like 125 grams. I did shave a hair more off the rear mount to improve the fit after I weighed it so figure 123 grams.

Aaron and I plan on selling numerous 175 specific items when we get around to it. The rear brake stays for both the 175 and 350 are a regular item of mine so if you want one just say so. I like to get $20 for them but if you can catch on on ebay ( like Scott ) then the buy it now price is usually $15 for the 175 stay.

I also can make you a Titanium version for $30, weighs 95 grams. Although most super trick parts go to Aaron first for testing.

I've got one set of intakes set to go...but its for the Vertical head on a sloper chassis... mounts the SL350 carbs, and allows the throttle cables to clear the frame tubes. Be advised that to use the SL350 carbs with a flange mount you have to mill off the little spigot that is on them.
I'll check and see how many head side and carb side flanges I have...not many, probably only a couple. Problem is the people that made them per my drawings seem to have a problem with their laser cutting vendor, for the last couple of months they have removed that capability from their list. Other choice is water jet cutting, which increases my cost for a flange from about $5 each to about $20 each...unacceptable. I've got an email out to them asking about the situation, if they get the lasers back on line I'll have another batch of flanges done.

Another acceptable carb should be the CL77 (superhawk) 26mm Keihins...I've got a nice set and flanges to fit...but jets are getting quite hard to come by for these carbs...they use a slightly different thread than the newer old Keihins...I've heard some people rethread them to take the same jets as the SL350 type Keihins.

It's all so fuckin complicated that my head is always spinning with numbers.

I'm also working on a new meg design that used 3" disks instead of 4" disks, very sanitary....disks about the same size as the end of the meg. I put a mounting plate on the back of the meg to take the disks, the plate is pre-drilled and can be threaded so you don't need nuts..which means the disk bolts can be INSIDE the meg...making a very clean looking installation. I'll have one done in about a week. I'm sending Aaron one to use at Daytona if he likes it.
JohnnyB
 

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Johnny,
I like it and I want one. While I had mentioned the idea, he has already started its production. Are you welding the ends on or making a cup style that can slide on the end that I could spring load on. If you make the meg with a slide on end, I will weld the loops with the spring attatchments. I'm thinking if I spring load all the exhaust when I crash, it will just sprung apart and then I can spring it back together.

Aaron
 

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Aaron,
Not sure if I'm understanding you right, but if I am, then it's a good idea. Basically you mean a slip on short tube, that slips over the big end of the meg? And this short slip on tube has the trapp disk mount welded on? And this little unit is held on to the meg with the usual 2 stroke spring setup?

Sounds pretty cool.... so basically if you wreck the pipe then hopefully when you replace the meg you don't have to weld on another disk mount, you just add the spring mounts and pop the old slincer back on?

Only issue I can see might be vibration... the big end of the meg takes about pounding from exhaust gas pulses...whadda wanna bet those pulses lift that rear silencer off the end of the meg and let the springs slam it back down about a hundred times a second. I could be wrong though, probably worth a try, springs under a decent tension would probably prevent this issue..( assuming it's even an issue).

So Aaron...you want I should make the new pipe like that?

Anyway... I'm like HRC... rider wants a new part to test, I make it. It's teamwork baby.
JohnnyB
 

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For 175 builders. One question has always been...will a 175 vert crank work in sloper cases at high rpm. We know they will fit just fine, we know they will run. But will the run at 9,000+ rpm.
We will find out, this engine now being built has a vert crankshaft. Let's hope it works, it's a customers bike.



JohnnyB
 

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JB, where would the difference show up? (In the physical crank) excepting for gravity, I would imagine that a crank would run with pistons (connecting rods) in virtually any degreee of 360, upside down, (180) or even 270 degrees, depending on how the cases are built. What would you think will make a difference above 9K? Vibration?

I got the brace, but it might be exactly the same weight as the one I have. I won't know for a while, as I have the bikes in storage till we move.

Scott

Hey, if Strempher is now a skull, and Bob C. is also, does someone have to start another list so we can all say things that we don't want them to hear or have you and Aaron already started a new one.



Edited by - imslow on Nov 28 2004 1:38:30 PM
 

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it is kinda funny that it seems like alot of people have moved to the skulls. even you champ! maybe it proves that everyone has a need to goof on occasion. that, and winters are long up there.

poor hiroshi...

jc
 

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scott, up in the right hand corner of the page there is a user name/password box. use that instead of the one at the top of the text window. when you do that, you'll see that the icons over the postings will change. one will be a pencil. click on that after you post, and you'll be able to change it.


me
 

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Scott,
I would think that vibration would be the only issue. Typically crankcase balance is somewhat "tuned" the frame or directed in a particular direction. There is an off chance that the out of balance component could be in a direction that would be undesirable on a sloper frame...probably not though.

I was using some dramatic license in the post.

JohnnyB
 

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Aaron,
Yeah... check those bearings for me, I'm curious.

And, read my post about the megaphone, I'll probably start on it tonight and I want to get it right.


Scott,
You already have an alloy brake stay? Cause if you still have the OEM stay I promise your new one is almost half the weight.
JohnnyB
 
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