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  Topic Review (Newest First)
07-20-2011 09:50 PM
1300 with 1800 final drive

For those with 1300. When putting a 1800 final drive in, you will find your speedometer off. We found out that it causes the bike to run "out of tune" , I'm guessing because the computer uses the speed sensor pulses to adjust for timing or fuel mixture or whatever else it adjust for speed. After installing and adjusting a speedoDRD, we found the bike ran great. The speedo was off by 17%. My 1800 is only off by 3 to 5 mph and I haven't seen any running problems. And getting an accurate gas mileage would take extra calculations, I may buy one just to have an accurate speedo.
07-15-2011 10:00 AM
Originally Posted by Pro-Gunner View Post
Below 55 mph my bike begins to lug and I have to gear down to 4th gear when passing other vehicles.
Absolute Correct, you can feel the pistons pounding in 5th below 55 grabbing too much throttle. That is lugging.
The rods are trying to pound through the thin oil film on the crank.

A vacuum gauge would prove the point showing low to zero manifold pressure
at that throttle opening with crankshaft held back from freely accelerating.

No different on piston aircraft, as manifold pressure is never abused with constant speed prop.
Air density at the prop is almost a solid, so too much pitch would lug the engine, just like too high a gear at full throttle.

Gentle throttle in 5th, 60 & below it will go fine.
To pass like you mean business, 60 & below, 4th is correct.
You instantly know it likes it.

Your truck under load does it, like it or not downshifts or unlocks torque convertor to pass.
07-15-2011 09:19 AM
Heavymetalman And now for some more data on the difference from a standard 1800 FD equipped bike:

Just took a nice ride with Sir Rock last weekend. We both topped off at his house in Milwaukee and reset odometers. We went all the way to Milton and Rockdale (Heather's Bar and Grill is very nice btw), and then came back through the Kettle Moraine scenic roads and back to Waukesha. As we were driving in New Berlin, Jason said his fuel light had just come on. He was showing the usual 134 miles when that happens. My bike only had 120 miles on it, for the SAME exact ride. I now have 145 miles on my ODO and just now the low fuel light came on. We rode exactly the same way, I probably rode more aggressively than him if anything and he had to bust it to keep up, like all of you do when ya'll ride with Heavy!! Anyways.....bottom line is now my speedo reads true, I get better mileage, and put on less miles on the bike than stock, and I seem to pull away pretty easily under acceleration from other 1800's with a passenger. Or did that always happen??

All in all, its a pretty good mod to do.

There is only ONE downside I have experienced. At a typical 55 miles an hour, with a passenger, I do get more vibrations as the motor works hard to keep pace. This doesn't happen if its just me, or I get over 60. Its the slower roads stuck behind grey hairs that the bike doesn't like now. On highways, its truly ideal though. So, if we go slow behind yet another stupid Buick driver, I put it into 4th. (no offense to any Buick drivers here, but the typical one is 70 and up and simply can't exceed the speed limit for any reason)

End of story. I hope you all enjoyed!
06-21-2011 01:58 PM
for real

Originally Posted by RadioActive VTX View Post
If the people with an 1800cc m/c need to switch there finale drive to 1300cc final drive to get better mpg's they should have bought a 1300cc m/c. If u buy a big dog feed the big dog. my .02 and can't spare any more..
are you for real? what does it matter to you, what other guys, are doing with their motorcycle? I don,t get you, maybe you just like to be negitive NOPE NOPE NOPE UNUH! GOOFY TO SAY THE LEAST!
06-01-2011 09:25 AM
Heavymetalman Good to see you are stil alive and well Keiko!
05-31-2011 11:06 PM
report on Final drive swaps

ok So this thread has been turned into a chat line, but i figure I can still post on it. After swapping final drives from my friends 1300 to my 1800 and my 1800 final drive to her 1300. I found my speedometer was off only about 3 to 5 mph. The difference increased as my speed increased. But its close enough for me. Her's on the other hand was over 10 mph to 20 mph. So I bought a SpeedoDRD. And using my GPS I did the calculations per instructions and programmed it. Got it right on the first try! which was to set it at -17.5%. I'm happy with the results. Costs $70 (free shipping) From 12oclocklabs. I may get another for my bike, just to have accurate gas mileage readings, since my odometer will read more miles then I actually put on. Hopefully this will help someone who might be looking for this info. And I guess I should say I am happy with the swap since I feel like my lower speeds are smoother, I'm used to having to shift sooner or my throttle feels touchy and it wants to launch. Over all a smoother ride for me. Gas mileage hasn't really been tested, but it doesn't matter since that will be different from person to person according to their riding styles.
05-31-2011 01:56 PM
Originally Posted by Roadblock View Post
well now that is both helpful and productive. in that case none of us should be walking talking riding adding or subtracting since we all started out not knowing what we were doing
very very true I like your style
04-28-2011 12:19 PM
Heavymetalman Oh great!

Thats good to know. Hal's Harley is right down the street from Steve's so we will give it a try before breaking down and paying their techs.
04-28-2011 11:06 AM
VTXretro1300 Heavy....I bought a set of Progressives off the for sale board last year. Finally got around to installing them this spring. The new bushings are A LOT more substantial than the old ones. Which is nice, but install is a royal PITA.

I was in the process of installing the springs when I found the old bushings were shot. I thought I would be able to muscle the new bushings in, but that was a tough go (even with all kinds of oil/lube on them). My neighbor and I tried the C-clamp and socket method to try to get them pressed in....no go. I tried soaking them in brake fluid to try to soften them up, and after 3 or so days of soaking they had only softened marginally.

I ended up taking them to Cap City Harley (I know the service manager, and we go there a lot for service on our work motors). He was able to get one of his guys to press them in.

Only had a handful of nicks to the bushings and the tech ended up with a cut to his hand.

Taking the shocks to a shop was my last resort. I didn't want to pony up the $$ to pay the shipping (both ways), labor, and parts so Progressive could press them in.

Just wanted to give you a friendly heads up for when you tackle getting the bushings in! There are some write-ups in the 1300 board I believe too (do a search for Progressive bushings).
04-28-2011 09:33 AM
Heavymetalman Ok Tim,
we will give that a try next time I have the bike up on the stand. Hunter and I are going to be changing out hydraulic fluid one of these days if it ever stops raining or snowing.

I don't quite see how I could generate enough pressure to force the bushing inside the shock that way but I'll give it a whirl. Steve has a fully equipped shop either way.

For those of you wondering, my Progressive Springs Shocks squeak like crazy. Despite every type of grease tried out, it was determined that the shocks bushings were the cause and that they had an older type of bushing that Progressive has discontinued and they sent me a better type. My bushings were shot from 20,000 miles of 2 up riding anyways, like that on almost every VTX I've seen. Thats the problem with the old school style of shocks our bikes have. At least the new Sabres have the modern rear suspensions that eliminate all that clutter. So, hopefully install new bushings and problem solved. As loud as my bike is, I hate squeaks and rattles.
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