Crankshaft Rebuilds For The Yamaha TZR 250 3MA PJ Motorcycle Engineers. The Yamaha TZR250 3ma like most 2 strokes has a pressed together crankshaft assembly, but unlike most two stroke cranks the crank pin (the part the big end bearing runs on) is replaceable. On the tzr 250 3ma crank the Crank pin is integral to the inner flywheel web. This makes the crankshaft difficult to quote for a rebuild. If there is wear to the crank pins then the crank cannot be rebuilt. Yamaha never sold that part on its own and there is NO aftermarket parts available!
Depending on how worn the crank is the webs may or may not need replacing, if the big end bearing has let go then 100% it will need a new web, if the engine has been left exposed to moisture then it will almost be scrap, we have had a lot of bikes come over from Japan that look really good only to open the engine up to fine water damaged.
But if the crank has done low hours then you may get away with a std build, but without stripping the crankshaft down it is impossible to tell what parts will need to be replaced
With a Standard crankshaft build we strip all the components of your crankshaft clean and inspect for cracks then replace the following parts, Con rods, Big end bearings, Thrust washers, small end bearing, all 4 main bearings, 2 centre seals and the 2 outer seals. All the parts are NEW and are high quality parts IE Koyo / Hic Bearings And Moto RRT Con Rods ETC.
We then build the crank on a jig which ensures the crank is phased at 180 degrees and the centre gear is phased in the correct position. The whole assembly is then trued by hand. The Crank is ready to be dropped into the crankcases.
The Price for a standard Crank Rebuild with all the above new parts fitted Is £396.09 + VAT
If you are requiring just the crank seals changed in the centre then the labour part of the build is £120.00 + vat
Turnaround is usually 14 days' workshop time, payment is not required until your crank is ready to send back to you. Payment can be via credit card, PayPal or bank transfer.
Please Get in Touch If You Need This Service Or If You Have Some More Questions.
Telephone: 01902 307457
Mobile Number For WhatsApp Messaging: 07884274838
Email Us Click Here websales@pjme.co.uk
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