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Enduro Engine - 2 stroke Cylinder, Piston, Tranny, Bearings, Clutch, Pipes & Silencers, etc.


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Old 02-09-2018, 11:40 AM
jcs003 jcs003 is offline
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Default Stroker Crank

Does anyone sell a drop in stroker crank? if not, who is a recommended builder to do the work?

Thank you,

John
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Old 02-09-2018, 08:39 PM
PEB PEB is offline
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For a 2 stroke? I have two used 2 stroke cranks for sale if you want one to send out to have work done on and not tear down what you have.
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Old 02-11-2018, 01:00 AM
swazi_matt swazi_matt is offline
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WHat is a stroker crank? Tried google but not sure it is giving me the right answers
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Old 02-11-2018, 01:44 AM
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Well the easy way is to find a rod with a bigger pin so you can offsetbore the crank for more throw.
Why would you bother?
The right needle and a head reshape will bring you more performance
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Old 02-11-2018, 08:13 AM
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Quote:
Originally Posted by (F5) View Post
Well the easy way is to find a rod with a bigger pin so you can offsetbore the crank for more throw.
Why would you bother?
The right needle and a head reshape will bring you more performance
I believe you can weld the existing hole and use the stock size pin. Stroker cranks need to be rebalanced to prevent bad vibes.

Big bore kit is another option.
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Old 02-11-2018, 12:39 PM
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If I remember right Jim Cook used to have a stroked out 250 - maybe he'll have some info for you.
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Old 02-11-2018, 04:31 AM
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Quote:
Originally Posted by swazi_matt View Post
WHat is a stroker crank? Tried google but not sure it is giving me the right answers
Its a crank with a longer than "normal" stroke.
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Old 02-12-2018, 12:39 AM
swazi_matt swazi_matt is offline
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Quote:
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Its a crank with a longer than "normal" stroke.
does that not increase the compression?
What are the benefits of this mod over just ensuring proper squish or modifying the head (insert) to increase the compression?
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Old 02-12-2018, 01:46 AM
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Quote:
Originally Posted by swazi_matt View Post
does that not increase the compression?
What are the benefits of this mod over just ensuring proper squish or modifying the head (insert) to increase the compression?
This is a trick mostly used in forstrokes to increase the capacity, like boring out the cylinder. Whether you select to bore or to stroke (or both) would depend on how you want your engine to perform.

You would have to raise cylinder to bring the compression down to normal, often done by placing a spacer under the cylinder. But on a twostroke, a stroker crank would also lead to changes in the port timing, making it more difficult to just add a spacer.
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Old 02-12-2018, 02:54 AM
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Quote:
Originally Posted by jcs003 View Post
Does anyone sell a drop in stroker crank? if not, who is a recommended builder to do the work?

Thank you,

John
There's a engine builder in the PNW that builds 2 stroke strokers, but for the life of me can't think of his name. I believe someone on this forum has a long stroke GG done by this person. Maybe in the Chicago area.

RB
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