Putting the new works truck to work

The TT Scout fits in a treat



- Posted using BlogPress from my iPhone

Performance Indian crack record

Jim Mosher and crew are now the record holders for the AV-F 1350cc class with a speed of 148 mph the previous record was 129mph

Fire Arrow Scout mock up

741b Scout motor, Norton 4 speed box, '58 Fire Arrow frame, BSA B40 fork 4.00x18 Pirelli trials tyres on Honda K4 hubs with flanged akront rims.
Tanks are 741b Scout. 10" of ground clearance if 13" shocks are used.

Perfect for a bash at Red Marley hillclimb!






- Posted using BlogPress from my iPhone

Mid mounts for the L'il Red Rooster

Being in trackside condition, the Rooster came to me with no brakes and with staggered foitpegs. Not much use on Highland roads, or tracks!

First job was to work out how....

Its already fitted with a pair of super light A&A Racing hubs and rims, the rear has provision for a disk, so to get a UK mot I'll need to rig up two independent means of braking on thd same disk.

For the foot pegs i trimmed the Bates fold up ones off their existing mounts made up some 3/8x1" flat hangers and fitted them over the ends of a 1/2" hex rod fed through the hex hole in the engine plates that usually takes the rear footboard mount... I turned the bar round on the lathe for where it feeds through the primary.

With the clutch pedal refitted i looked to the RHS to suss out a brake pedal and try to hide a master cylinder.




Best place for it is tucked in behind the rear exhaust and mounted to the engine plate (I'll make up a little heat shield to hide and protect it). I turned down the brake side of the hex bar and made a steel sleeve to fit it, cut up an old honda brake pedal ( one that came with the Nissin master cylinder) to use the pivot end on the sleeve. And cut a flat bar to be carved in to a pedal then both can be welded to either end of the sleeve.




- Posted using BlogPress from my iPhone

Location:Church St,Fortrose,United Kingdom

Sometimes its a good to go back to an old idea

Thinking about a stroked 741b motor in a Fire Arrow frame, I mocked this up a few years back but shelved it while I got the Sport Scout finished

the powerplant needs moved back about 2" but everything lines up nicely and most of the  parts are "Indian."

Desperately Seeking Speed

Chris Ireland is at Bonneville with Bella this week... and next week, looking to break some records.

You can follow his progress here speedweek updates

Best of luck  Chris 8)

Bob Nichols Racing

New website up and running.

Bob Nichols Racing

Class C 45

Arrived at the Speedshop this week, '37 Bonneville Scout in a modified 1950 Warrior TT frame


- Posted using BlogPress from my iPhone

Another afternoon fettlin in the sun

Fitted a new needle and dashpot damper to the SU, still running too lean, i think the pancake air filter isn't really helpimg matters!
Thinking of fitting a more restrictive air intake




- Posted using BlogPress from my iPhone

Testing

In for the night

- Posted using BlogPress from my iPhone

All together again....

Fuelled, oiled and ready to rumble..... but ive been too busy in the shop today to get it going!!!















I did get a chance to make up a cut down spark plug key using my cut down 1/2" af cylinder base nut spanner and an old plug socket

Location:Sunny Achnasheen

Back on its wheels

Just a few odd jobs to do then i can fill up the tanks and get the motor recommissioned




- Posted using BlogPress from my iPhone

Forkin about

Stripped the front end to make up new fork stop and decided the top yoke could lose a bit of weight











- Posted using BlogPress from my iPhone

Nearly there

Heads on, tanks on, waiting for a couple of packages of small parts for the carb and a pipe bender so i can tidy up the oil and fuel lines and it should be ready to fire up 8)





- Posted using BlogPress from my iPhone

The latest from Tony and crew

At Indian Trading, this little 101 wall style bike is going to be a cracker!









- Posted using BlogPress from my iPhone

Location:A862,Inverness,United Kingdom

Next in the queue for some attention

The SU carb, was an experiment that worked out quite well, a reconditioned HS2 1.25" carb originally set up for a Morris Minor 1000 car. It hasnt been changed from the Morris setup, I'm sure the carburation can be improved considerably, so I have been doing some homework!

Final drive ratios

While i have the scout on the lift, i decided to take note of some figures, to gelp get the best out of the stroker motor. I know that these figures will give me only theoretical top speeds etc but its good to know what gearing changes will do to your rev/speed ratio once you are on the road.
First off, with the cylinders fitted set the rear piston to tdc and put a chalk mark on the rear tyre, selected 1st gear and rotated the wheel for one full revolution of the crank... measured the distance travelled, same again for 2nd and top gear.






The Scout is fitted with a 24t gearbox/trans sprocket and a BSA qd rear wheel with a 49t sprocket giving a final drive ratio of 2.04:1

The BSA hub won't give me much scope for sprocket changes, so I'm thinking of changing to a Honda CB72e rear hub, with the advantage of a TLS rear brake, to let me try a range of sprocket sizes.... I reckon an FDR of 1.5:1 should work with the motor without losing too much acceleration

Trial fit alloy 648 tank

Mounting tabs will need some reinforcement but they are a nice neat fit






- Posted using BlogPress from my iPhone

Compression Ratio figures

Checking the variance between front and rear cylinders without gaskets, with 1mm copper and with used compressed James gasket








- Posted using BlogPress from my iPhone

Tanks for comparison

Tank on the left chromed steel Junior Scout weighing in at 2.88kg the tank on the right an aluminium 648 Scout spec tank, its LH partner weighs in at 1.65kg ... Bigger bulkier but almost half the weight!




- Posted using BlogPress from my iPhone

Sorting out the Sport Scout heads

Just been in to see John at Moray Firth Precision Engineering in Inverness, he's just finished skimming and matching the 640 heads for the Sport Scout. When I stripped the top end off the motor at the tail end of last summer, I found that the heads were running at different compression ratios, and that the rear head was badly in need of a skim.
My pistons pop up above the cylinder beck by 0.087" .. John has matched the pop up in the head to 0.118" to allow some clearance, if more is needed I can sort that out between the base and cylinder head gaskets.

Big Base

The ‘Big Base’ Indian 648s were the ultimate development of flathead engine technology, with high-dome pistons carrying two compression rings and one oil ring. The name came from the huge oil capacities, because the bikes were fitted with extra-large sumps designed to help engines cope with the stresses of racing.

Its thought that only seven factory Daytona Sport Scout 648's are stll in existence, so the chances of ever owning one are highly unlikely.

With a lot of Indian tuners still chasing ultimate performance for their vintage racing Scouts, it is possible to build a replica motor, up until now the sticking point has been availability of cylinders... looks like that may not be an issue any more!

available from ... www.enfieldracing.com

Flatslide Del

Kindly donated to the Injun cause by Richi at Fossfab this 39mm VHSB Dellorto from an Armstrong Rotax motor to try out on the Sport Scout using an adapter I got from Rocky at Ironwigwam








- Posted using BlogPress from my iPhone