Transmission

[The Dark Shadow]

OK, here's another radical concept.

The gearing on the st1300 is very short for optimum fuel efficiency at 110 to 125kph.

I had a Honda shadow slasher 750 in Japan (spirit in the USA and Canada) and the stock gearing was so short as to be ridiculous. First thing I did was change the sprockets. Then i changed it to a belt drive (Scootworks USA). The bike was EXCELLENT with the taller gearing.

I read quite some time ago that the CTX1300 has a taller gearing than the st13. I don't remember if someone was successful in changing out the trannies putting the taller ctx tranny into the ST. And I can't find this info on the net presently.

Does anyone know about this crazy topic...?

Thanks eh!

 

[Kevcules]

When I owned my beloved 2004 KLR650 that was absolutely bulletproof, didn't even mind 10 year old brake fluid, , I had went from the stock 15 tooth front sprocket to a 16 and even tried a 17 tooth. It transformed the bike. Lowered the rpm buzz significantly. I mostly drove on the street anyways by that time.
That would be interesting if you could source a taller geared transmission.
Good luck

 

[bdalameda]

It's possible the taller gearing on the CTX is the rear drive gears and not the transmission

 

[Al st1100]

At a certain point wind becomes more of a drag and detriment to gas mileage. Taller gear would most likely be better under or at 70 mph. Simple test is get a taller rear tire. Take a 190/60 17 tire make 30 less revolutions per mile . Time that an 225 miles (aprox) per tank of fuel equals 6,750 less revolutions.

 

[STRider]

It's possible the taller gearing on the CTX is the rear drive gears and not the transmission

Nope, the bevel and ring gears of the CTX1300 and ST1300 are the same. Not surprising really. It's far cheaper to just change the ratios inside the transmission than to make new final drive castings and other components related to that gearset.







IIRC, the CB900 and CB1000 Customs from the early '80s had their dual range gearbox only so Honda could route the power from the output shaft of the transmission, which was on the left on their air-cooled four-cylinder engines, to the right side of the bike so they could reuse shaft-drive components from the Gold Wing, which had its shaft on the right. Parts-bin engineering at its finest.

 

[Larry Fine]

And notice the SOHC CB750 valve cover as the fill cap.

 

[Al st1100]

It's possible the taller gearing on the CTX is the rear drive gears and not the transmission

ctx uses a 200/50 tire which is shorter than the st1300 stock tire. . The motor is designed different , has more lower end torque, uses regular fuel. So my best guess is the trans is geared differently. research it enough and you can find the actual gear ratios.

 

[ASPC]

Gear Hobbing & Cutting Services - Precision Gear Hobbing | Ashley Ward

Ashley Ward has the capability to precision machine: worm, helical, bevel, and spur type gears. Contact Ashely Ward today to find out more about gear hobbing services!

www.ashleyward.com

 

[Larry Fine]

And notice the SOHC CB750 valve cover as the fill cap.

You may laugh, but it really is the same part, just like STs and Goldwings.

 

[STRider]

You may laugh, but it really is the same part, just like STs and Goldwings.

Oh, I get it! I have eight of those buggers on the valve cover of my CB400F too. No need to invent something new if that part on the shelf does the job.

 

[SMSW]

Gear Hobbing & Cutting Services - Precision Gear Hobbing | Ashley Ward

Ashley Ward has the capability to precision machine: worm, helical, bevel, and spur type gears. Contact Ashely Ward today to find out more about gear hobbing services!

www.ashleyward.com

I suspect if you have to ask the price, you cannot afford it.

 

[Willsmotorcycle]

I know next to nothing about this, however online sellers have the easy to read parts diagrams. The transmission gears for the the ST and CTX are the same. @STRider has mentioned above about the final drive.

 

[ASPC]

 

[Igofar]

Go to ronayers.com find the part number, put it in the search box, and click where else is this part used…
Just about every Honda ever built uses that cap in one place or another, from the 50cc scooters to the wings.

 

[Oldbikefixr]

Go to ronayers.com find the part number, put it in the search box, and click where else is this part used…
Just about every Honda ever built uses that cap in one place or another, from the 50cc scooters to the wings.

.....and from the early 1960's at least. The early caps were well cast and domed a bit. They polished up extremely well. I passed on the remainder of mine with the last of my classic Hondas a few years back. When I got the 1991 and noticed an old friend covering the filler hole, I regretted not keeping a set. Like lots of 'flash' that came on early bikes, I suppose the flat ones saved a few cents so the accountants moved on.