Posts: 65
Joined: 8/24/2016
Location: Mayaguez, PRI
Edited Date/Time:
In december 2017 I make the decision to make a engine top-end work to my '05 CR250R for the next new year. But surprise, after take all the top-end out I found that the engine needs a complete rebuild and here is the history in pictures... 
Posts: 3654
Joined: 1/17/2013
Location: TN, USA
Very nice bike, I noticed you have a Core decal in the background, there brake line's are high quality.
There's something happening here, what it is ain't exactly clear.
Posts: 1178
Joined: 8/20/2013
Location: League City, TX USA
Posts: 65
Joined: 8/24/2016
Location: Mayaguez, PRI
ledger wrote:
Very nice bike, I noticed you have a Core decal in the background, there brake line's are high quality.
Works well but the rubber cover in the clamp area isn't the same as stock and a day riding in a mx track that piece break and the brake line come lose. I had to do a work with straps to complete the race day.
Posts: 65
Joined: 8/24/2016
Location: Mayaguez, PRI
Posts: 65
Joined: 8/24/2016
Location: Mayaguez, PRI
Posts: 65
Joined: 8/24/2016
Location: Mayaguez, PRI
Posts: 65
Joined: 8/24/2016
Location: Mayaguez, PRI
Posts: 65
Joined: 8/24/2016
Location: Mayaguez, PRI
Posts: 65
Joined: 8/24/2016
Location: Mayaguez, PRI
Posts: 65
Joined: 8/24/2016
Location: Mayaguez, PRI
Posts: 65
Joined: 8/24/2016
Location: Mayaguez, PRI
Posts: 65
Joined: 8/24/2016
Location: Mayaguez, PRI
Posts: 65
Joined: 8/24/2016
Location: Mayaguez, PRI
Posts: 65
Joined: 8/24/2016
Location: Mayaguez, PRI
After cleaning the frame I take the decision of assembly the engine installed to prevent scratches and dings in the motor. 
Posts: 45
Joined: 8/9/2018
Location: AUS
Posts: 65
Joined: 8/24/2016
Location: Mayaguez, PRI
Posts: 65
Joined: 8/24/2016
Location: Mayaguez, PRI
Nothing better than a new Hinson basket! My home made clutch locking tool made me the job very easy. 
KG factory clutch plates looks like OEM ones and with Barnett steel plates is my favorite combo.
Posts: 65
Joined: 8/24/2016
Location: Mayaguez, PRI
Posts: 65
Joined: 8/24/2016
Location: Mayaguez, PRI
Before installing the piston I made this holes on it to cooldown the exhaust port bridge. The piston is a Pro-X "A". 
Posts: 65
Joined: 8/24/2016
Location: Mayaguez, PRI
Posts: 65
Joined: 8/24/2016
Location: Mayaguez, PRI
Edited Date/Time:
Here is the RC ex-valve system, LH cover and the big switch, the carburetor, I change it to a Keihin PWK38 short bell from a '01YZ250. 
Posts: 91
Joined: 10/2/2017
Location: Harrison, TN USA
Posts: 65
Joined: 8/24/2016
Location: Mayaguez, PRI
FarleyMX25 wrote:
What kind of paint did you use for the engine?
Powder coating satin black with silver letters for the covers and the rest with Klass ready paint satin black.
Posts: 65
Joined: 8/24/2016
Location: Mayaguez, PRI
Posts: 65
Joined: 8/24/2016
Location: Mayaguez, PRI
I was working with the rear suspension today. To see if is true that it's "Factory Connection". 
Posts: 65
Joined: 8/24/2016
Location: Mayaguez, PRI
Posts: 65
Joined: 8/24/2016
Location: Mayaguez, PRI
Posts: 2892
Joined: 11/3/2014
Location: Charlotte, MI USA
Posts: 50
Joined: 2/18/2014
Location: IRL
nascarnate326 wrote:
Is drilling holes in the piston a well known mod?
Yes, if grew up riding two strokes its a very common thing
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All parts was cleaned in a Safety-Kleen parts washer.
