Triumph powered what???

[jimg1au]

why have the 500 brad has all the bikes in the early classes
pre75 t140 750-900 depending how much money you want to spend also for you non british bike riders LHS gear shift
if it handles around corners its a drag bike in the straight
jim
pre65 yetman triumph tr6r 750 racer

[firko]

Why not consider building a TriBsa? I reckon the T100 would fit in a B50 frame. In my opinion, the B50 is a great handling bike once you have a decent fork and shock combination on them. The B50 frame is much stronger than the earlier C15 or B40 frame too. 

They actually made a T100R powered B50 for a short period back in 1972 or so, the TR5T. Genuine Triumph Adventurers (Triumph Trophy Trail in US) are few and far between but you could easily build your own using a BSA B50 roller and a Triumph T100R engine that'd make a great pre 75 4T racer. You could use a B44 frame for pre 70 and a B40 frame for pre 65. I believe that the Trumpy engine bolts right into the B50 frame, the B50 and Triumph engines sharing the same engine mount layout. I reckon one of these would make a great Pre 75/4stroke class racer using Betor or Ceriani forks, Yamaha front wheel, decent rear shocks and a lot of poundage hacksawed off the roller.

Triumph introduced the TR5T Adventurer on/off road Trail bike in late 1972. Powered by a 490cc version of Triumph's venerable 'Twin' (itself a successful race motor equally at home on road), the chassis was effectively BSA's B.50 MX (BSA being Triumph's parent company at the time), a chassis still good enough to be winning major motocross events in 1972. Unfortunately the Adventurer would only survive until 1974, the money having dried up and the Triumph motorcycle brand going under. Today the dual-purpose Adventurer is seen as one of the great 'might-have-beens' of the British Motorcycle industry, which, with more development money, could have been one of the greats.
                                                                                   
                                                                                   

[firko]

Here's another take on Triumph 500 engine swaps, a Tricot....a Triumph 500 powered Cotton.  While this one is pre 65, you could do the same with the very similar AJS Stormer for pre 75. I started to build one of these, but abandoned the project when I got my Metisse roller. Yamaico Pete owns the frame today. The Cotton frame is made from Reynolds 531 tubing and is extremely light and very modern in layout for a sixties built item.
                                                                                                   
                                                                                         

[shortshifter]

Wow,lonin' the look of all these specials especially the Cotton one.Didn't some guys put Triumph engines into Greeves frames (Grumphs) for desert racing in the US?

[FourstrokeForever]

Yeah Firko, I did realise the B50/T100 had been done by the factory after I posted my blurb. I remember seeing one up in QLD (Brad!!!), at Mike Reily's place a few years back. It wasn't complete but was a brand new bike. From memory, I think the tank and exhaust were the only bits missing.
There's a lot of weight to be saved off the B50 frame as you say Firko. By running a remote oil filter set up you can remove a big section of the backbone past where the rear loop top rails connect to it. The beauty of removing all that extra weight is the added bonus of being able to fit a decent air box as well. I run a CCM air box on mine. I've got Betor forks and shocks on my B50. After fiddling with PDS valves and YSS classic ($600) shocks, I tossed the lot and went back to the standard Montessa valving with slight mods on the rebound holes. It cost me a set of original dampening rods to fit the crappy PDS valves and when I went to re-oil the shocks, well, lets just say push bike suspension has more components. The Betor MX shocks cost me @ $300 delivered and are excellent straight out of the box. I use a '74 Honda XL front hub and reckon it's the ducks guts. The brake is light years better than the Montessa set up I started with. One finger braking all day long! I use a early Bultaco rear hub that saves heaps of weight, but I reckon a Maico hub might be a bit stronger. At least the B50 has brakes to match the big thumping pommy lump of motor now 

[TM BILL]

Yeah Firko, I did realise the B50/T100 had been done by the factory after I posted my blurb. I remember seeing one up in QLD (Brad!!!), at Mike Reily's place a few years back. It wasn't complete but was a brand new bike. From memory, I think the tank and exhaust were the only bits missing.
There's a lot of weight to be saved off the B50 frame as you say Firko. By running a remote oil filter set up you can remove a big section of the backbone past where the rear loop top rails connect to it. The beauty of removing all that extra weight is the added bonus of being able to fit a decent air box as well. I run a CCM air box on mine. I've got Betor forks and shocks on my B50. After fiddling with PDS valves and YSS classic ($600) shocks, I tossed the lot and went back to the standard Montessa valving with slight mods on the rebound holes. It cost me a set of original dampening rods to fit the crappy PDS valves and when I went to re-oil the shocks, well, lets just say push bike suspension has more components. The Betor MX shocks cost me @ $300 delivered and are excellent straight out of the box. I use a '74 Honda XL front hub and reckon it's the ducks guts. The brake is light years better than the Montessa set up I started with. One finger braking all day long! I use a early Bultaco rear hub that saves heaps of weight, but I reckon a Maico hub might be a bit stronger. At least the B50 has brakes to match the big thumping pommy lump of motor now 

Got any pics , would love to see the bike .

[TM BILL]

This was a B50 framed 500 Triumph at a recent Auckland CSC meeting , the owner was pedaling it along real well 

https://www.facebook.com/photo.php?fbid=10200118296438537&set=a.4682991371130.1073741839.1784246570&type=1&theater

[firko]

Didn't some guys put Triumph engines into Greeves frames (Grumphs) for desert racing in the US?

The Triumph engined Greeves or Grumph as everyone called them were fairly common all over the motocross world in the late fifties and early sixties. They were also really popular in the USA desert and even as a cool cafe racer. The 500 unit Trumpy motor fitted in the Greeves frame with ease and the end result was possibly the first truly lightweight motocrosser. My old chum Frank Stanborough reckons they were one of the best handling bikes of the era which is what inspired him to build his 250 NSU four stroke powered Greeves....Green Sue  (get it?). To me the only real downside of the Grumph conversion is that they're so plug ugly. I reckon one of these would make a bitchin' pre 60 class bike though using one of these 1959 Greeves Hawkestone models as a basis***.see bottom photo. dunger early frames often come up on UK eBay for low money.
                                                                             

                                                                             
                                                                                               
                                                                           
                                                                           
                                                                             
***                                                                   

[KTM47]

What about one of these. http://www.maico.wulfsportinternational.com/gallery_disp.php?subaction=showfull&id=1270125105&archive=&start_from=&ucat=1&

Bill Brown should know better than to do that to a Maico

[firko]

Here's an updated version of Bill Browns Trico
                                                                                   

[09.0]

The plan is to get the motor then worry about what to put it in after. Have to make sure the funds are there for the projects at hand.

[VMX247]

another Grumpy, a fast bike and winner of many races.
This photo taken in WA

[VMX60]

Brad

500cc pre unit


http://www.ebay.com.au/itm/TRIUMPH-PRE-UNIT-5T-MOTOR-MAY-SUIT-SPEEDTWIN-T-100/321244760406?_trksid=p2045573.m2042&_trkparms=aid%3D111000%26algo%3DREC.CURRENT%26ao%3D1%26asc%3D27%26meid%3D2626311835261325078%26pid%3D100033%26prg%3D1011%26rk%3D1%26rkt%3D4%26sd%3D321244760406%26

[VMX247]

Brad, spend more   

[09.0]

I think pre 65 open is where I need to be with this as I don't have a bike for that class. Then ride it in another class till it's not competitive at club level, if you know what I mean.
I might have to make a submission to am to split the classic nats up. 6 bikes and 8 classes is getting out of hand. I didn't even get to race the rm125 at this years nats