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Ironhead Sportsters, Shovels

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  #11  
Old 21-11-2008, 02:56 PM
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Re: Shovel primary?

Thanks for the info Dave.
I am going to go for a 22T crankshaft sprocket (with new shock absorber) keep the 24T gearbox sprocket and fit the 51T rear sprocket, which should give me a final drive ratio of about 3.57 and see how it goes, I will probably run a sealed primary with ATF and an M6 tensioner.
I will let you know how it turns out.
Cheers Graham.

that will teach me to check the clutch.............
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  #12  
Old 02-01-2009, 11:46 PM
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Re: Shovel primary?

Slight change of plans, got hold of a second hand 24T compensator sprocket assembly off of B & H down in Roche, (could not find a 22T one) so I am going to run a 22T gearbox sprocket and 51T rear sprocket to lower the gearing, Still gonna seal up the primary,
Just out of interest what is the shift pattern as standard, mine is 1 up 3 down which is a little weird as my mates Glide is 1 down 3 up, any comments?
Anyone here used the clutch tamer from Hogbitz they sell the kit for about £60, as my old Ram Jett retainer has melted.........I want to sort my clutch out once and for all as I am fed up with smashing it in to gear and then not being able to find neutral with the engine running
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  #13  
Old 03-01-2009, 09:30 AM
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Re: Shovel primary?

Graham

Standard is one down three up. Why yours is different I don't know, needs a more experienced man than me to answer that.
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  #14  
Old 03-01-2009, 06:04 PM
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Re: Shovel primary?

Which way up is your gear change ratchet arm, up or down? Do you have a mid mount through the case gear lever or is it a forward mount set up? Your answer may give a huge clue as to your up for down problem.
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  #15  
Old 05-01-2009, 03:19 PM
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Re: Shovel primary?

Tamer and the Ramjett both have a good rep. I don't have either, I have an oddball Aussie version of the Tamer made by some Victoria engineer....but the principle is the same, I am reliably informed.


And now, an interesting lesson for us all in shifter drum direction, courtesy of HawgRyder off the USA shovel site. Interesting stuff ....

*snip*
The FX with the shifter through the middle of the primary has it's linkage "reversed" when compared to an FL.....and yet it still shifts 1 down and 3 up, same as any FL. But it bears repeating...the linkage is reversed. On the FL the linkage goes to the bottom of the ratchet...and to the top on the FX. This reverses the swing of the ratchet...hence the two different shift drums available for four speed trannies...the "FX" drum is reversed to accomodate this.

Picture this: On an FL...when you press down on the shifter lever to engage 1st gear...you are moving the ratchet clockwise. Yet on an FX...when you do the same thing...you are moving the ratchet counterclockwise. Conversely...if you are shifting "up" on an FL...moving the lever up....that turns the ratchet counterclockwise to shift the tranny up. And when shifting "up" on an FX...you are turning the ratchet clockwise to shift "up".

So.....if you put an "FL" style tranny into an FX bike...using stock FX mid-control shifting linkage and installing an FX tab on the ratchet...you will have reverse shifting because of that. When you press down on the shifter you will be making the ratchet turn clockwise, which means "shift up) on the FX tranny and your shift pattern will be 1 up and 3 down. Same for vice versa, putting an FX tranny into an FL bike using all stock FL linkage components.

However, if you install an FX tranny into an FL bike...and if you leave the FX tab on the ratchet...the one that points "up"...and connect it with a straight rod to the stock FL forward mounted shift lever...all will be fine, with 1 down and 3 up....because that straight linkage is transmitting the exact motion of the shifter arm just like on the mid-control linkage.

Not one single doubt about it.

It's all about geometry...and that shift drum inside of the tranny

Last edited by kiwidave; 05-01-2009 at 03:24 PM.
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  #16  
Old 06-01-2009, 01:59 AM
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Re: Shovel primary?

Thanks Kiwi. I didnt have the energy to try explaining that. I hoped that Graham was going sus that out for himself.
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  #17  
Old 07-01-2009, 04:56 PM
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Re: Shovel primary?

Cheers all
I have an FX box with a FL style link to the bottom of ratchet which explains the pattern, I am in the process of making a new ratchet arm to allow it to fit to the top and give me 1 down 3 up.
Graham.
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  #18  
Old 07-01-2009, 06:12 PM
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Re: Shovel primary?

If you are going to use the M6, make sure there is enough oil in the primary case to cover it.
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  #19  
Old 08-01-2009, 11:03 PM
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Re: Shovel primary?

Quote:
Originally Posted by spinlondon View Post
If you are going to use the M6, make sure there is enough oil in the primary case to cover it.
Cover how much of it, I thought the M6 was a sprung tensioner and as long as the chain dipped into the oil then the slipper would be kept lubricated enough to stop it wearing out?
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  #20  
Old 08-01-2009, 11:08 PM
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Re: Shovel primary?

After making and fitting my new shift arm and fitting all the linkage I have now realised why it was like it was, The link will foul the crossover pipe when run to the top of the ratchet so I may well be back to 1 up, 3 down.
(I had just about got used to it anyway) unless I change the pipes which at the moment I like the twin pipes with the rest of the bike as it is.
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