triumph questions?......

[zgears]

so, i have a few triumph questions. maybe you guys can help.

1. will a tri 3cy 750 fit in a 63-70 650 frame? i would guess yes, but before i go buy one.

2, got any cycle tank dent removal tricks?

3. any trick to puting the front end on, and not haveing the lose geasey ballberrings fall out?

thanks -josh

[Flat Ernie]

Can't help on #1
#2 - convert to Timken roller bearings. Get the dimensions you need & check them out online.
#3 - I've seen it done with dry ice for small shallow dents & one of those weld-on dingle-berry slide hammer thingies (was that technical enough? http://www.jalopyjournal.com/ubbthreads/images/graemlins/tongue.gif ) I've also heard of putting water in it & freezing it, but I don't know that I'd try that - with my luck, I'd split the seams!

http://www.jalopyjournal.com/ubbthreads/images/graemlins/cool.gif

[zgears]

yea, ive heard of the roller bearing thing. sounds easyer said than done, and i dont want to machine the frame.
anybody done the dry ice trick? or have any other good dent tricks?

[Flat Ernie]

[ QUOTE ]
yea, ive heard of the roller bearing thing. sounds easyer said than done, and i dont want to machine the frame.


[/ QUOTE ]

Depends what you're looking to do - I just measured mine up, went online, entered the dimensions into the Timken search & found something that should work. We'll see, but it should work with no machining...

If you know your neck size (bore of the cone), & your frame size (OD of the cup) & the thickness of the race, you should be able to find something that works. If you don't find it first time out, try converting your measurements to millimeters & switch the search to metric - you'll likely find something.

If all else fails, you can pay the guy on eBay something like $70 for a conversion - he advertises timken roller bearing conversions for Triumphs...I usually find him by doing a search for "springer" in the european motorcycle section - he also sells a conversion bearing to use HD 1" neck bearings in the Triumph frames.

http://www.jalopyjournal.com/ubbthreads/images/graemlins/cool.gif

[**DONOTDELETE**]

[ QUOTE ]
If all else fails, you can pay the guy on eBay something like $70 for a conversion -

[/ QUOTE ]

easiest thing to do...

[disastron13]

The Triumph twins are light bikes, no special reason to run tapered roller bearings. The monster 500 pound plus bikes need them, they would brinnel the races of a ball bearing. But they aren't nesessary on a Triumph, and with tapered rollers which need to be pre-loaded, you lose steering accuracy.
Better to stick with the ball races which were used on Triumphs from 1902 to the 1970s, and worked perfectly well.
Just use heavy grease like Campagnolo or Phil Wood from the bicycle shop, then your balls won't fall out of the races. Plus those heavy greases are real waterproof.
The Triple motor is larger in every dimension than the twin, I don't advise you to try the swap.
I don't advise anyone to get involved with a Triumph triple motor unless you are a real expert with $3000 extra layin around.
Good luck on your project

[zman]

I have to disagree, I believe tapered roller bearings are far superior in all respects to the loose ball bearings. Every vintage race bike I ever worked on had them. Every older bike I ever owned I did the conversion as well as bronze swingarm bushins and noticed immediate improvement in handling. The loose ball bearings tend to make the front end feel exactly as they are loose. It's easily worth it. Look at all the AHRMA vintage bikes and you'll see that they are running tapered rollers.

[zgears]

sorry, scott i dont do "up dates". i respect what yer saying, about better riding and all. besides how can someone change from ball bearings (3/8 dia) to tapered roller bearings without major machining? im just saying seems like overkill.

[disastron13]

Yeah you are right about the swing arm bushings, always amazed me that the brit bikes had such weak swingarm pivots, usually a small iron cast lug brazed to a single down tube. Couldn't they follow the load path?
The only company that did it right was Velocette with the big bearings, hardened and ground CHRMO tapered bore shaft, and tapered 531 swing arm tubes. But look what those bikes cost compared to BSAs and Triumphs.

[disastron13]

OK to answer the question, how to you change without major machine work, there isn't any
The bearing cups on all Triumphs 1903 to 1970 come out of the frame just like those on a bicycle.
Just use a long hardened punch to carefully tap out the old cups.
The kit with the tapered roller bearings comes with new cups.
Couple things to be careful of, some of the cheap kits from the chopper type shops have lousy chrome plating that changes the size of the cup.
And set up your new roller bearings with just the right amount of pre load, or they will brinnel the races and become sloppy and "rachety"

[Flat Ernie]

Triumph Timken bearing conversion (http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=2485457187&catego ry=10065&sspagename=WDVW)

Looks like his straight conversion is considerably cheaper than his other conversion...

http://www.jalopyjournal.com/ubbthreads/images/graemlins/cool.gif