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rick1962uk Started a new thread Fastest pre75 250 Engine
2/24/2021 5:26am hi i want to build another race bike grasstrack same as flat track i use to run a 74 KX250 with great sucsess but want a change and fancy a cr250 or yz 250 both 1974 or what is the mx250 like all im after is the fastest one HP wise i will be modifying it to the max but...
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rick1962uk Added a reply to Fastest pre75 250 Engine
2/21/2021 12:58am
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rick1962uk Added a reply to Fastest pre75 250 Engine
2/21/2021 12:55am
rick1962uk Added a reply to Fastest pre75 250 Engine
2/17/2021 2:10pm crank is hear so i now can get on with it stator machined to fit next will be to clean up the webs and rebuild with the new RodKit 
rick1962uk Added a reply to Fastest pre75 250 Engine
1/25/2021 12:12pm
rick1962uk Added a reply to Fastest pre75 250 Engine
1/25/2021 12:10pm
Head Time
rick1962uk Added a reply to Fastest pre75 250 Engine
1/25/2021 12:08pm
rick1962uk Added a reply to Fastest pre75 250 Engine
1/22/2021 7:06am the carb 
rick1962uk Added a reply to Fastest pre75 250 Engine
1/22/2021 7:03am
rick1962uk Added a reply to Fastest pre75 250 Engine
1/22/2021 7:02am
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rick1962uk Added a reply to Fastest pre75 250 Engine
1/20/2021 5:53am
This is the frame its going into
rick1962uk Added a reply to Fastest pre75 250 Engine
1/20/2021 5:51am
The start long stroke watercooled motor will need to be changed to a short stroke air cooled one a lot of machining
rick1962uk Added a reply to Fastest pre75 250 Engine
1/12/2021 3:12pm so sexy i will post photos as i go getting there with parts it will go in fits and starts so mid way dont think i have stoped its just time slots
rick1962uk Added a reply to Fastest pre75 250 Engine
1/10/2021 1:14pm Many thanks all made my mind up and brought a can-am mx2 engine will work out the most expensive but should put out a lot more power god help me
rick1962uk Added a reply to Fastest pre75 250 Engine
1/9/2021 2:03pm taco are good but not sure they would take the power im going to give them i thought they was a bit fragile inthe 70s and would the clutch take 45-50hp
CDswinehart Liked a reply to forum topic Fastest pre75 250 Engine
1/9/2021 2:01pm
I would second the Astro idea.
This forum topic has 30 replies.
FreshTopEnd Liked a reply to forum topic Fastest pre75 250 Engine
1/9/2021 2:01pm
You might try to find a Bultaco Astro engine
This forum topic has 30 replies.