Topic: Riding Ergonomics

[Lostboy Steve]

Since we're on the topic of tits. My throttle is "tits". Very smooth and easy to turn, my clutch on the other hand, well, I hate traffic.

[Sprocket75]

Well, I swapped out my big tittys for low profile tittys. Been riding all day, but the verdict is not in yet.

[Powderman]

Isn't the PC verbiage now "tig bitties"

[nccb]

Well, I swapped out my big tittys for low profile tittys. Been riding all day, but the verdict is not in yet.

Nothing wrong with low profile tits, just need to fit the body, i mean bike, or whatever we're talking about

[Retro Rocket]

Isn't the PC verbiage now "tig bitties"

We are not real good with "PC" round here....

[BobbyR]

Isn't the PC verbiage now "tig bitties"

We are not real good with "PC" round here....

PC is for Hipster Vespa Riders in Lower Manhattan.   

[bjbuchanan]

Isn't the PC verbiage now "tig bitties"

We are not real good with "PC" round here....

PC is for Hipster Vespa Riders in Lower Manhattan.   

Friends don't let friends ride scooters

[Retro Rocket]

^^^^ ^^^^

[K_Kalynuik]

  I would love to find a new throttle return spring. I looked everywhere in Toronto, cant find one to match with proper tension. I wont try modifying the original spring as some have suggested. My luck ill mess it up and be stuck trying to find an original again. Anyone got any ideas?

[bjbuchanan]

  I would love to find a new throttle return spring. I looked everywhere in Toronto, cant find one to match with proper tension. I wont try modifying the original spring as some have suggested. My luck ill mess it up and be stuck trying to find an original again. Anyone got any ideas?

Stop looking for the stock tension I thought you wanted lighter...

Get some right ones and stretch to your liking, you aren't gonna find something perfect.  Lube those cables and linkage along with routing the cables properly before you go experimenting

[TwoTired]

  I would love to find a new throttle return spring. I looked everywhere in Toronto, cant find one to match with proper tension. I wont try modifying the original spring as some have suggested. My luck ill mess it up and be stuck trying to find an original again. Anyone got any ideas?

Don't your hardware stores stock springs?

[K_Kalynuik]

Cables are brand new and lubed.

Hardware stores do not stock the type of spring. Ive gone to a few spring suppliers but nothing matches or fits the carbs properly. I assume we are talking the spring that is in the attached picture? I don't see any other compression/rebound type springs on the 78' 550 carbs. that's the only types of springs my hardware stores have. Not the torsional kind like on my carbs.

Am I Missing something?

[Sprocket75]

I thought this was the spring?

[Lostboy Steve]

Isn't the PC verbiage now "tig bitties"

We are not real good with "PC" round here....

PC is for Hipster Vespa Riders in Lower Manhattan.   

Friends don't let friends ride scooters

lol, that should be a crime. I have nothing against old lambrettas or vespas, but if you look like that, you deserve a #$%* slap.

[TwoTired]

Am I Missing something?

Yes.  You are showing a picture of the earlier carbs rather than the PD style.  Might have helped if we were told about this beforehand.

I don't have a return spring strength issue on my 78 with PDs.   Have you changed the throttle end of the cable control, grafting something from another application?

You know you have to separate the #4 carb from the rack to change the spring, right?  You can still modify the spring.  Take it off and coil it a bit tighter on a smaller mandrel, then reinstall.  Or, make a 1/4-1/2" link between the existing spring hook end and the catch point to allow the spring to relax.   But, I wouldn't experiment with a spring extender when using a single pull cable.

[crazypj]

It sounds like cable routing is wrong as you say you have new lubed cables.
May not be a bad idea to post pic of bike to show cable routing?

[TwoTired]

It sounds like cable routing is wrong as you say you have new lubed cables.
May not be a bad idea to post pic of bike to show cable routing?

Very good point.  The sharper the bends in the cable, the more they resist movement under tension.

I once acquired a "cafe" conversion, with cables both kinked and with sharp bends.  In fact, the clutch would disengage when the bar were turned halfway toward the left.  Throttle was awful too, sticking and also hard to hold position as well.  It had very low bars.  Which went into the trash.

[bjbuchanan]

Maybe now that you guys mention cable routing it will be noticed, I only mentioned it twice before

[K_Kalynuik]

 Sorry didn't know that pic was from earlier carbs. That's close to where the spring looks to be on my '78 550 carbs. I used that pic as reference. So, I have to take the rack apart to get at that spring? Looks like ill leave it be and work out my wrists. That was the info I needed. Thanks again TT.

Yes using an adapted throttle from the 06' GSXR front end. Its nice and smooth and no sticking issues. Just tough to twist in comparison with any bike ive ever seen. Cables are 100% not kinked. Sorry no pics, bike is stored away from me for the winter. Ill try to get pics of the routing one time and start a new thread. But for now, Ill let this thread get back to riding ergonomics and not cable routing and carb springs.

[TwoTired]

What size is the handle bar dia .  7/8 or 1 inch?
 The standard 78 cb550 throttle tube cable bed diameter for the cable is 30mm.  The larger the grip diameter the more mechanical advantage, given the same cable bed diameter. 

I don't know what the 06' GSXR throttle tube cable bed diameter is.  If, for example, the cable bed diameter is larger than the grip diameter, more force is required to overcome any given return spring.  While less movement is required, more force is needed.

[crazypj]

Maybe now that you guys mention cable routing it will be noticed, I only mentioned it twice before

Ah, but it wasn't the first or only point.
Gen 'Y' needs hand holding through things more complicated than a ham sandwich

[bjbuchanan]

Maybe now that you guys mention cable routing it will be noticed, I only mentioned it twice before

Ah, but it wasn't the first or only point.
Gen 'Y' needs hand holding through things more complicated than a ham sandwich

I'm gen Y... tho I do agree. Too much instant access from day one for us.

I don't really like to ask questions tho, I search everything. If you see a thread from me it is a pretty tough question usually

[crazypj]

  I would love to find a new throttle return spring. I looked everywhere in Toronto, cant find one to match with proper tension. I wont try modifying the original spring as some have suggested. My luck ill mess it up and be stuck trying to find an original again. Anyone got any ideas?

Did you look down the back of the sofa?

[evanphi]

  I would love to find a new throttle return spring. I looked everywhere in Toronto, cant find one to match with proper tension. I wont try modifying the original spring as some have suggested. My luck ill mess it up and be stuck trying to find an original again. Anyone got any ideas?

Did you look down the back of the sofa?

Maybe the last place he looked?