XS 650 Yamaha racing crankshaft
by Chris Applebee Engineering
we specialise in dynamically balancing & OVERHAULING all motor bike crankshafts
If you have any questions please do not hesitate to ask.
on 01268 776642 or email firstname.lastname@example.org
Thanks for looking
cr 500 crankshaft
Ken OConnor Racing building a CR500 crankshaft
Tips for rebuilding the CR 250 crankshaft
How an Engine Kit is Balanced
The Process of Balancing an Engine Kit is a highly meticulous job. This
video was created for Coast High Performance to give its customers,
followers and racers an idea of what it really takes to balance an engine
kit. The process can easily take a few hours and should only be done by a
properly trained professional.
There is truly an art to balancing and whether its a 28oz, 50oz, internal,
external or neutral balance, coast high performance have the professionals
needed to pull off such a feat!
Rephased XS650 with Jack's D-Shaped Intake Ports!
700cc with JE Pistons, 277 Rephased Crank, Early Camshaft, 277 Pamcopete
Ignition and all the normal goodies we do to an engine at Hugh's HandBuilt.
All but 1 exception. We spent the last few months with "Jack" from the
forums, and he's taught us a TON of new ways to get some flow into the
heads on these engines. This particular engine has had the intake runners
"D" Shaped, with a raised floor and some healthy 2nd turns, and slightly
shrunk in diameter to raise velocity. Very special thanks to Jack for
taking the time to hang out in the shop with us, and show us a few tricks!
270 Degree Rephased XS65 - Hugh's HandBuilt
Thats right folks, we finally built a 270 Degree Rephased XS650 Engine
Ok, here comes the flood of emails, questions, etc... So I'll just quote
Wikipedia for the reason to rephase an OEM Firing Pattern of 360 (which is
the stock XS650 engine configuration) to a 277 or 270
"The classic British parallel twins (BSA, Triumph, Norton, AJS & Matchless)
had a 360° crankshaft that, compared to a single, gave twice as many
ignition pulses, which were evenly spaced.
The Yamaha TRX850 had a 270° crank that allowed a more regular firing
pattern than a 180° crank, and less regular than a 360° crank. This
configuration has the best possible secondary engine balance for a parallel
twin; its Exhaust sound and power
delivery is identical to a 90° V-twin." - Think Ducati or Suzuki SV Series
While we do a TON of 277 engines (it's the most cost effective rephase for
the XS650) this one is 270 degrees. I've always wanted to build one. It
requires a specially made center pin for the crank ($$$$$) and 2 donor
cranks to build a single 270 crank. Then the camshaft and ignition must
also match the new firing order of course.
What you see here, is a 750cc 270 Degree XS650 Engine, using JE Pistons,
our HHB D-Shaped Ported Head, 5th Gear OD, HHB 6 into 7 Clutch mod, 5th
Gear OD, HHB Oil Cooler and all the other little tricks we do at Hugh's
I hope you enjoy it. Go find our Blog, and check out the other cool things
you can do with these bikes. They are a blast to own, mod and work on.
Balancing a Jaguar E Type crank at Classic Jaguar in Austin, Texas
Crankshaft Balancing Counter Weight Reduction
This big block Chevy engine is getting a trim job on the crankshaft counter
weights because we are installing some .400" longer connecting rods with
some very light forgerd pistons. We had to remove a total of 400 grams to
get the crankshaft to balance correctly. Costa Mesa R&D Automotive Machine
Shop (949) 631-6376 Don't forget to 'Click' and SUBSCRIBE and tell your
friends about this channel.
XS650 Big Bore, Rephased Street Tracker
Another one of our engines, installed in a customers street tracker. Super
nice bike, and now with the power to really put down some rubber. Running
a Rephased Crank and Cam, a 750 Heiden Tuning Big Bore Kit, Our "Mild"
ported head, and a few other goodies. Hugh's HandBuilt PMA Alternator,
Pamcopete ignition, Omars Pipes, and Mikuni Roundslides top it off.