Professional Motorcycle Tuning's latest rebuilds

Bike No.1, owner Denis Hadina

 Engine had full rebuild as in rebuilt crank to 277 deg with MikesXS fat 750cc kit, my mild street cam, ports just cleaned up, s/steel valves and spring kit from MikesXS’s as well.

Engine cases were wet blasted, not soda blasted as that can “stain” the alloy, all gaskets and seals replaced. Carbs are from 650 Central, VM34’s, and a custom made pipe that the owner got made to no specific design, just the look he was after. New cam chain with both front and rear tensioners replaced. Electrics are supplied by a Sparkx unit running total loss and the ignition is a Pamco 277 deg unit to match the rephrase. Gearing is a tall 17/30. Unifilters on the carbs, I prefer K&N filters as these do not “crush” as the engine starts to “breath”.

 Bike is a bit hard to start, starter motor removed but I left the cross over shaft in place if the owner wants to retro fit it back, could do with a small gel battery to assist with this starting problem.

 Got the bike fired up and checked the timing as this can only be done with the engine running when a Pamco unit is fitted, checked and adjusted the balance of the carbs, they were a bit as was the ignition timing, exhaust note was awesome out through the Supertrap muffler, time for a short test ride, I let the owner out on it first, no rego, yet.

Under our Victorian nanny state hoon laws the bike would be off to the lock-up for a month and big fines, so I let the owner done the honors. He came back with a grin from ear to ear.

I just had to have a go, now remember that this engine has only got maybe 15 minutes on it and is running tall 17/30 gearing, stock is 17/34, all the thing wanted to do was rev and lift the front wheel, just wait till it is run in. BLOODY AWESOME!!!!!!

 Some fine tuning on the carbs, put a small battery under the custom seat to help with the starting and on to the dyno to see what it will make, but I am happy as is the owner at this point in time.

Bike No.2, owner Mike Dalton

Basically the same, 277 deg, Pamco, 1mm over bore 650 pistons, same cam as above, stock valves and springs, stock carbs with K&N filters and an exhaust system from MikesXS.

I rebuilt this engine about 6 months ago and it was back for its 500Km service, ignition timing check, valve adjust, carb synch and oil change. All found to need just a minor tweak. 

These two bikes are totally different styles as you will see, one more stockish the other is bobber/tracker style, which would I have? Both! Rephasing these engines make them totally different from a standard crank version, give a stock one a rev and it will “walk” backwards out the door, a rephrase just sits there. I don’t care who does it but to rephrase one of these engines is the best thing you can do to a Yamaha XS650, full stop!!

If you require any more info, you know where I am and I must thank Denis Hadina (white 650/750) and Mike Dalton (black 650) for alloying me to perform my magic on these two Yamaha XS650s. Now just to get Dazzled completed so I can go and have some fun.

Kind Regards

Daryl Hutcheon