Topic: 550/600 clubman racer research thread.

[mlinder]

I guess I'm not understanding your linkage setup.

[DavePhipps]

When I find my stylus for this tablet I'll draw it for you. Sorry, it's hard to find a good close up of the area I'm talking about.

[mlinder]

As such?
http://www.carbibles.com/images/bike_rear_monoshock2.jpg

[DavePhipps]

As such?
http://www.carbibles.com/images/bike_rear_monoshock2.jpg

The link 404ed on me.
Here's one I found with simalar placement

[turboguzzi]

nice idea but i doubt if you'll mange to pass the shock in the gap between the wheel and the front tube of the swingarm without increasing the wheelbase with a longer swingarm = longer wheelbase. That's something you wouldnt want to do to a race 500/550, slows the steering. Actually the hot ticket in a 500/550 is fitting a shorter 750 swinger.

not to mention the fact that the 550 frame doesnt even have a cross tube to attach the top mount (you'll need to add that), the need to work out very precisely the leverage ratio according to the shock stroke with proper CAD, etc.

not trying to put you off the idea but if i can give you a general advice, try to keep your modifications to the minimum if you want to get the bike up and running quickly. You'd be surprised to know how well the twin shock setup works with good dampers.

my 0.02$

TG

[mlinder]

Thanks Guzzi. I was going to say what you said this morning. Just didn't have the energy for it last night.

[DavePhipps]

OK guys, I just want to make it clear that nothing is set in stone for this project. It's all research to find out information, and share what I learn. Don'y worry about hurting my feling with critiques. I welcome them, especially when they come with an explanation.
I've asked about the monoshock conversion here and on the WERA boards. Everyone says go dual shock , it's easier to setup.  TGand mlinder made the best point for going dual shock. Mainly there's alot to research. My knowlege in this area is limited, so dual shock it is. I'll keep researching the monoshock conversion and perhaps do it someday. It's not hard to do I'm just not sure if I'm doing it right.
On the subject of twin shocks, anybody got a pair of shocks that they would like to donate to a race project? Longer than stock is ok.

[turboguzzi]

there's a simple way to make stock length (or other) shocks to give you the rear ride height you want + change their angle

there must be pictures in one of my threads, if you dont find them pm me and ill take a shot + measurements.

[DavePhipps]

TG you have so many threads it's difficult to find what you're talking about.

[DavePhipps]

Anyone familiar with this piston?

From the site
Product Information
61mm 13pin High comp piston kit with rings and pin
12mm top of pin to deck.
The piston is higher comp that showen in photo.
This piston kit can be made to fit the yx150/160.

[turboguzzi]

No problem man, will get you a pic

that piston.... too little height above the pin and how do you sort out that 13mm pin? you cant really reduce a 15mm hole in the rod with a 1mm thick bushing. Maybe it can all be made to work with howell's solution with GSXR1000 rods.

finding easy to fit pistons for small sohc's is a bit of a PITA


 

[turboguzzi]

like you said elsewhere, here's some powa to ya'

its self explanatory i think, top mount to wheel axle distance is now 440mm. got to say that this is a bit extreme, yields a 23 degs rake, you will need triple clamps with less offset to restore trail to about 90mm if you want to ride this high on the back. Would go 1" less with stock clamps. Steering is damn quick though

nice thing is that you can make a few plates to try out different heights.

TG

[DavePhipps]

very nice, simple and effective, I like it!

[DavePhipps]

OK, on to exhaust!!!
I have laser header for the CB550, but after reading a few threads found that the ID is too small for the 650 head 
I know MAC makes a 4-1 for the 650, but are there other headers out there that might work a bit better?
I can make my own cannister, megaphone or reverse cone megaphone with just a bit of work.
The other option is to make my own pipes but I have no mandrel and have very little clue as to how to go about it.
Reading here to learn more
http://coneeng.com/

[DavePhipps]

MOre specifically here
http://coneeng.com/weld_on_collector_kit.html

[turboguzzi]

http://www.marving.com/faces/detprodotti.jsp?prodotto_id=209696

[coneeng]

OK, on to exhaust!!!
I have laser header for the CB550, but after reading a few threads found that the ID is too small for the 650 head 
I know MAC makes a 4-1 for the 650, but are there other headers out there that might work a bit better?
I can make my own cannister, megaphone or reverse cone megaphone with just a bit of work.
The other option is to make my own pipes but I have no mandrel and have very little clue as to how to go about it.
Reading here to learn more
http://coneeng.com/

Fabbing the headpipes is time consuming but not that difficult once you decide what diameter is optimal.  And for a lot of bikes it is the only option since there are not many bolt-on options for older bikes.  If you are copying someone else's older design, make sure it had the same purpose as your bike.  We see a lot of people copy a header that was originally designed for drag racing on a road race bike, and vice-versa.

Once you have the design, you can make the header by sectioning standard mandrel bends such as 180's, 90's 45's etc.  Actually the muffler cannister is one of the harder parts as there are actually a lot of parts inside there.  We're now doing generic slip-ons that have been proven to work on the street (Lossa Engineering cafe bike on Cafe RacerTV) and on the track  (WERA V1V2 Natl Champ on 350) and on dyno.  Size the pipe to your headpipe on a 1-1, 2-1, etc or your collector if a 2-1, 4-1, etc. 

[DavePhipps]

For cannister I was going to do the generic 4 inch can with 2 in perforated material and packing.
I've been on the coneng site a bit lately, looking at what I'll need to buy for the 550/600 build,  and for fixing the ZFR600 exhaust.
Too tired to ask much right now. Must sleep. Goodnight

[DavePhipps]

Next research topic is total loss ignition. I will probably save the stock loom and make a total loss loom. I have a general idea of how to do this, but correct me if I'm wrong. My thought was to replicate the wiring going from the battery to the coils, and the coils to the points or electronic ignition. Will I need to have the voltage regulator in there? There will be no starter, stator, lights, or indicators of any kind.

[mlinder]

reg/rec not required for total loss ign system.

[DavePhipps]

I'm still researching piston information and it seems that every forum I go to I find that TG has already been there. I did find one interesting bbit of information though. It seems that FZR600 pistons have been modified for the XL125. As the XL125 pistons have been used for the CB500 racers, it seems that this might be something to look into. The stock FZR piston is 59mm so it would not help the 500 racers out there but maybe the my bigbore would benefit from it. I'll report back with what I learn