L/C Cr/Wr 5 speed vs 6 speed

[Nikel]

Hello.

Anyone got any gearing ratio on these two(four?) gearboxes?
For the 500 85-87.

I still want more speed out of my 500 =D

 

[fran...k.]

looks like 5 (five) for the 500 have to look at 430cr in 1987 xc vs cr
http://www.cafehusky.com/threads/vi...ech-data-and-husvarna-service-bulletins.4694/
85 pdf page 69,71
86 pdf page 99,105
87 pdf page 123,155,157

The xc transmission is as wide ratio as sidecar gearboxes.
When I had the road tires on my 83 it ran into wind issues not gearing issues but the water cooled ones probably have more transfer port area, central exhaust pipe connction, and I had the exhaust choked up for noise.
One thing bikes like yours have that I know no other similar is the availablility of front sprockets. I have from 10 to 16 and even think I saw a 17 in the sheets somewhere.

I seem to recall George/Uptite mentioning using less compression among other things for high speed desert applications of the air cooled 500. Be safe I have my doubts that frame is really up to big road tires.

 

[2premo]

if you look in the parts fische for 87 or 88 you will find the gear ratios by looking at the teeth (count) and doing a little math
do you currently have a 5 speed or a six speed?
the 5 speed was stock on that year CR but there are options such as XC or WR box
had all three, these were meant to be dirt competition, but the dessert XC version is what you might be after,
i think it might be the same as the WR been too long since i looked
wide ratio six speed will give you a bigger spread but the jump in the upper gears will be pronounced with your final gearing

http://www.halls-cycles.com/images/PDF/Husqvarna .PDFs/1980-1989/87_all_models.pdf

 

[2premo]

http://www.yourhusky.com/files/tech_data_81-88.pdf

take a look in here as the ratios are shown as well as the final crank to wheel, they are not in a great order

 

[Nikel]

I think the 86 500XC 6 speed is the one to go for.
Primary is 1.79 instead of 2.3 but the 5th and 6th are the same 20/27.
With the XC gearbox the bike would do 120 mph at 6500 rpm instead of 95 and it would have a lower first gear.

This is the way to go.
Faster acceleration and higher top speed.


How much do I need to change?

 

[2premo]

I think the 86 500XC 6 speed is the one to go for.
Primary is 1.79 instead of 2.3 but the 5th and 6th are the same 20/27.
With the XC gearbox the bike would do 120 mph at 6500 rpm instead of 95 and it would have a lower first gear.

This is the way to go.
Faster acceleration and higher top speed.


How much do I need to change?

you want to run 87 88 main shaft as the clutch bolts on, the gears will fit from shaft to shaft (six speed)
i thought the WR XC gears were the same from the early 80's through 88

 

[SK Marls]

Nikel: Realistically, what top speed do think your 500 will pull?

 

[Nikel]

you want to run 87 88 main shaft as the clutch bolts on, the gears will fit from shaft to shaft (six speed)
i thought the WR XC gears were the same from the early 80's through 88

How do I know what year my main shaft is from?
I have the 6 spring clutch if that matters.

Do i need the XC gearing drum?
And i need the 6 speed gearing star thingiwingie right?

I actually didn't go trough all of the years is the pdf.

 

[oldbikedude]

If my memory serves me correctly, the 1st thru 5th is the same between CR,XC, & WR. Sixth gear is added on top for more speed.

 

[2premo]

yo

How do I know what year my main shaft is from?
I have the 6 spring clutch if that matters.

Do i need the XC gearing drum?
And i need the 6 speed gearing star thingiwingie right?

I actually didn't go trough all of the years is the pdf.

you will need the six speed shafts, shift forks and gears
find a complete six speed XC or WR from a 430 or 500 is the easiest way to deal with it, get everything between the cases
the 87 and 88 used the 6 spring clutch and yes you want to keep that part
your primary gears (inside the clutch covers) will still be used, the same shifter but a different shift drum

 

[fran...k.]

yo

you will need the six speed shafts, shift forks and gears
find a complete six speed XC or WR from a 430 or 500 is the easiest way to deal with it, get everything between the cases
the 87 and 88 used the 6 spring clutch and yes you want to keep that part
your primary gears (inside the clutch covers) will still be used, the same shifter but a different shift drum

That is pretty much it. The part of the shifting drum that has the pegs and sticks into the primary area would be attached to that stuff. It will be hard or involve a good bit of luck to get the clutch basket to correspond with the primary drive on a 500xc with the bolt on clutch.

Back up and look at this a bit different. Possible scenario, Engineer designs new engine, 250 model has six speeds, 430 single transfer per side has six, 500 with dual transfers per side gets a 4 speed with wider gears and more robust engagement dogs. Marketing and racing take over engineer moves on to next project.

This application is for a road tires on road surfaces with no dampening in the drive system. It is a pretty grim 2.45 wide low to high as opposed to 3.53 for the big wr/xc ratios but what is normal for a solo street bike. Depends on applicaton, research that class of bike. Are the tooth faces and engagement dogs more robust with what you have?

 

[Bigbill]

The 6th gear ratio in the 6 speed wr is the same as the 5th gear ratio in the five speed cr. When we look at the '87 chart in the '81-'88 specs. All of the gear ratios are there except for the 83/84 a.c. 430.

 

[fran...k.]

The 6th gear ratio in the 6 speed wr is the same as the 5th gear ratio in the five speed cr. When we look at the '87 chart in the '81-'88 specs. All of the gear ratios are there except for the 83/84 a.c. 430.

I couldn't find an 87 cr 500 in that pdf file but from the ipl/parts sheets it's primary and secondary transmission is the same as 430cr. I used the 430 moto=cross pdf pag 155. I guess that is what he has, 500cr, didn't see it stated though.

Like you state both have high ratio of 27/20 I think different part numbers, more than think it is two gears in one in the 6 speed, a single in the 5. First is 16/29 in one and 13/34 in the other those are the ratios I used to come up with the numbers above.

The 3rd fourth and fifth are screwed up in the parts sheets that lists z=teeth. It might be advisable to pull the plug, put in first and crank (socket not kick lever) one revolution, put in high and see if it comes out 2.45 times as far. I would be cautious about that parts sheet. Looks like third and fifth are transposed but z for fourth doesn't match right, at the moment. Not sure they are calling the number(ratio 1 to 5) right as to drawn size, placement,

Back in the paper days the dealers marked errors and updates.

 

[Bigbill]

Look at the 84 250wr and the 500cr the gear ratio in the tranny is the same. I'll check the year of the 500 6speed again but I think it's 1984.

The 87 430 is the first 5speed cr. The 5th gear has the same final ratio as the 6th gear final ratio. To make a five speed they removed a gear set in between 1 and 6th. I didn't look closely at the five speed to figure it out if we can believe the charts.

 

[oldbikedude]

87 430 info

 

[fran...k.]

Those are overall ratios rounded off to one decimal. Make low 1 and high is 2.45 and 3.60 using those numbers. Looking at how far one revolution moves the motorcycle. Did you look at the parts sheet to see what I was referencing about foruth. Or that the primary reduction for 500xc is different than all 430 and 500cr in that year.

 

[2premo]

one thing to consider is the XC 500 has a higher primary drive than the others 37:70 vs 33:76 on the CR and the 430 XC
if you are looking for speed try that
it gives an overall higher ratio all other things consistent