MY PHOTO CARBURETTER

Replacing the carburetter

Always replace the carburetter fully assembled with the float chamber and mixing chamber top attached. The manifold flange and any heat reducing spacers should be carefully checked and dressed if necessary to ensure they are flat. Bolting the carburetter to a distorted flange or uneven spacer increases the risk of carburetter body or flange distortion.

Mark 1 carburetters are not designed to bolt tightly to the intake flange and may distort if overtightened. It is only necessary to compress the O ring seal to ensure air tightness. When correctly tightened the carburetter flange and engine manifold should be just touching. Nyloc nuts should always be used to mount Amal Mark 1 carburetters and should be tightened to no more than 4 ft lb.

Ensure that throttle and choke cables are able to open and shut freely when the petrol tank is replaced on the bike, and

TO REMOVE THE REAR WHEEL

Raise the machine by placing a 3 in. thick wooden block underneath the center stand. Ensure that the machine is in gear and remove the rear chain connecting link. Remove the left muffler. Remove the wheel spindle nut, and withdraw the spindle from the left side. Cpllect an adjuster and  end cap from each side of the swinging fork. Detach the speedometer cable from the drive box. The brake caliper can now be swung down out of the way and the wheel removed.

Replacement is the reversal of the removel procedure but always remember to swing the brake caliper back into position and relocate the support plate on the wheel spindle.Finally check the rear chain adjustment and wheel alignment.

Rear Wheel
The rear wheel hub bearings are of the non-adjustable ball journal type, or roller taper bearing ( i change it, and made in Italy). A detachable steel sprocket bolted to the hub by four bolts.

BRAKE BURNISHING PROCEDURE

Brakes should be bedded in progressively during the first 300 miles. This is done by gradually increasing brake lever pressure during the period and braking from progressively in creasing speeds.
For guidance refer to my list down here.

Stage 1
A minimum of 20 stops using the front at rear brakes together. Decelerate from 30 m.p.h to rest using the distance travelled or time taken to obtain the required deceleration.


Stage 2

IGNITION TIMING - part 2

Ignition Timing Part 2

There are two slots in the flywheel , one at 38 degree  and one at top dead centre ( T.D.C). When timing is above check with a aparking plug, removed that the PISTONS are not at T.D.C which would indicate the wrong slot being located. The T.D.C plug is for degree plate use only

The second method necessitates removel of the circular plate at the forward end of the primary chaincase. Through the aperture will be seen the timing marking on the rotor casting and  this aligns with a pointer on the primary chaincase at the adge of the aperture. Placing the rotor making in line with the pointer again gives the 38 degree timing position

Remove both sparking plug to facilitate over the engine. Set both sets of contact breaking gap. Set the engine at 38 degree with the contact breaker cam turned clockwise to thefully advanced position
Check the left hand points (Black and Yellow Lead) which should just be starting to open. If they are not, slacken both the pillar bolt and turn the contact breaker main backplate.

Turn clockwise if the points open too early and vise versa.
When correct lock up the backplate, remove the flyweel locating pluger if used and turn the engine again at 38 degree ( one revolusion)

Set the engine again at 38 degree. Check the cam is still at the fully advance position and check at the second set of  contacts are just starting to open. If there is any discrepancy , slacken the secondary backplate top and bottom screws and using the eccentric adjuster screw move the backplate to achieve the correct opening point.

The timing is now correct. Re- lubricates the felts with 4  drops of clean engine oil and refit the cap.

Triumph Bath Tub - My Grand Father

My Triumph Photo 2012

My Triumph Bath Tub 2012