The Trifield Trials page...

 

The Steve Saunders "Trifield"...

 

After last years Scottish two-day trial Justyn Norek snr sent me photos that he and jnr had taken at the trial…

There was a series of photos of a very nicely built Triumph engined Royal Enfield Crusader framed bike that Justyn had cadged a ride on..

I thought perhaps we should do a page one this what now seems like a poplar breed of trials bike the ‘Trifield’…this is after Steve Saunders won the Scottish trial on his lightweight version a few years ago…

I did enjoy building the Crusader that we built and can see why the frame became popular.

One thing that is not too good is the swinging arm on these Crusader frames and unless you can find one from a sports model you need to fabricate your own.. A lot seem to think it necessary to alter the steering head angle to make it steeper. But is this really necessary when most fit longer rear shocks for better ground clearance. So we will see were this page goes as there is a lot of these builds now out there, and perhaps you the owners of these bikes would like to send me photos and build notes on your bikes. I am sure this page could turn into another of those pages that create information to those of you wishing to put a similar machine together. Lets see how it grows..

 

 

Justyn Norek Jnr trys out the Scottish built "Trifield"...

 

 

I think he likes the bike...

 

 

The proud builder shows the bike to Justyn...

 

 

They do make a nice trials iron...

 

Looks like this bike wears one of the new alloy barrels that have become available.

 

Yes that barrel looks new...

 

 

Well built Sid...and mates...

 

There is always something to adjust...

Thank you for the Photos Justyn Norek...

 

 

Bring the bike back Justyn they need it for the event...

 

OK this is a start as always, I have a lot more photos of Trifields in my albums form over the years so I will add these as I find them...

more later as always...

 

Mark Stokes Trifield...

 

Here is Mark Stokes “Trifield”

I seem to remember built in 2014 after he had seen the win of the Scottish trial  by Steve Saunders, he wanted a bike with the same sort of look and the Growwwwwl…

It was probably that noise that persuaded him to go that route…

Mark again used the Crusader frame, and after looking closely at Steve’s bike wanted the engine in the same sort of position, this meant lowering the swinging arm holes slightly to get a good position and chain run… nothing is simple is it to get a job right. The front end was taken care of by fitting a pair of billet yokes and Betor forks with later short leading axle Royal Enfield fork sliders. The now standard fitment of a pair Alan Whitton’s Triumph Cub replica alloy brake hubs were laced to some trendy modern black rims. And used on both ends of the 52 1/2 inch wheelbase bike. The engine, Mark plumped for was a 490 unit unlike many that use a 400cc lump. This had the low 7-1 Triumph pistons fitted from the Tiger 100. Unlike a lot the clutch unit was a standard Triumph item and a road going engine sprocket. Sitting in the place of the Lucas alternator was one of the Electrex World ignition units…

The most work on the engine was with the cylinder head where Mark eventually came to fit smaller inlet valves taken from a Triumph “Twenty-One” 350… this and a 25mm Concentric carb, got a clean lift from the throttle………..The use of a Honda wrap-around oil-cooler fitted behind the fork yokes helped boost engine oil capacity from the small alloy tank fitted, it is a job to get this right as the twins always did run hot, and I have known the oil to boil. Some use the gearbox and a paper canister filter for the engine oil, and in some cases if it is a wet trial like you nearly always get in the Isle of Man and Scotland this constant water cooling should help the situation. And of course these are the two trials with the longest road mileage (or track).

The bike as you can see has a Brown and Gold colour scheme and this I like, and have you noticed how well it blends into the natural background especially on a wet muddy day.

 

 

Betor Forks from a Ossa Gripper and Magical springs, India Enfield sliders...

 

 

Thanks Mark...

More later...