86 cr250 w/89 water pump cover; HPP issues...

fastfun1
Posts
13
Joined
5/31/2015
Location
Macomb, MI US
Edited Date/Time 6/7/2015 7:48pm
Having post restorations issues with my HPP...
I did a rather seamless swap of an 89 water pump cover during my restoration. Since my restoration, Ive jetting jetted the bike to run as best as my mechanical abilities allowed. However, something seemed very off, especially while riding at less than 1/4 throttle. I finally pulled off the left HPP cover and checked the valves, no movement. Any suggestion??? other than decarbonizing the system, is there something I should do?
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barkhard696
Posts
1469
Joined
1/30/2010
Location
Houston, TX US
6/7/2015 7:14pm Edited Date/Time 6/7/2015 7:14pm
You're going to need to clean the powervalves and set the spring tension, there is a discussion here, yes it's an 87 but the details are the same

http://www.vitalmx.com/forums/Old-School-Moto,22/1987-Honda-CR250-Proje…

And a further details here:

http://www.vitalmx.com/forums/Race-Shop,42/1987-Honda-CR250R-complete-r…

Basically, putting on the 89 cover on a 86/87/88 involves more than just bolting up the cover. Be sure to read each page COMPLETELY because setting the tension on the valves is tricky to do correctly.
fastfun1
Posts
13
Joined
5/31/2015
Location
Macomb, MI US
6/7/2015 7:48pm
You're going to need to clean the powervalves and set the spring tension, there is a discussion here, yes it's an 87 but the details are...
You're going to need to clean the powervalves and set the spring tension, there is a discussion here, yes it's an 87 but the details are the same

http://www.vitalmx.com/forums/Old-School-Moto,22/1987-Honda-CR250-Proje…

And a further details here:

http://www.vitalmx.com/forums/Race-Shop,42/1987-Honda-CR250R-complete-r…

Basically, putting on the 89 cover on a 86/87/88 involves more than just bolting up the cover. Be sure to read each page COMPLETELY because setting the tension on the valves is tricky to do correctly.
Thank you! I've obvously missed a couple steps. It looks like an easy fix! Thanks again!

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