Saturday, May 23, 2015

CR250M-Many Problems Solved

Over the past couple of weeks all of the issues with the CR have been sorted. First of all, the rear tire was finally mounted about two weeks ago. All tolled, I mounted the tire six times before I finally got it done. The forth time that I mounted it the tire did hold air, but when I went for a ride the tube blew out. I had repaired it...obviously not well enough. The last time I mounted the tire I used an extra heavy duty tube...which was even harder to mount, but I suspect that it will be with the bike until I die or sell it to someone else.

The next issue to present itself for solution was the right side cover...see above. After removing the cover to take a look at the clutch, I remounted the cover only to discover that the kick-start shaft was binding in the side case cover. I tried numerous strategies to solve the gasket...old gasket...nothing really worked. So I proceeded to very slightly enlarge the opening for the kick-start shaft in the side case with my Dremel tool. I had no worries about creating an oil leak because the opening the the side case has an oil seal, and the oil level in the side case is well below the opening. Right now...everything is cool.

The next issue was the rear suspension. When I finally received the bike, it was clear that the right rear shock absorber had received a mighty blow. It was bent inward at least 2.00cm...a little less than an inch. I was going to replace the shocks so this discovery was not a heart breaking event. I ordered some Betor shocks from Spain. Delivery was promised in mid-March. By early May nothing had arrived so I had to look at my options. My first thought was Falcon Shock Absorbers. The guy there is Robin Packham. I have used Falcon shock absorbers on my TLR for many years and I am very happy with them.

You get very personalized service with Robin. We ended-up talking on the phone for a long time finalizing all of the specifications. Every shock is custom made at Falcon . My shocks turned up on my door step about two weeks after we completed the order. They are beautifully made.

Unfortunately my Betor shocks showed up shortly after I placed my order with Robin. One of the nice things about the Betors is the fact that the body of the shock is the same color as the bike. Take a look at the picture below. Leaning against the rear sprocket are the Falcon units.

Less fortunately, the Betors needed a lot of work to mount. Grinding was necessary and some hacksaw work was required. On the other hand, the shocks seem to hold up the swing arm just fine. I am looking forward to trying the Falcon shock absorbers. I ordered the Falcon shock absorbers with 70 lb. springs, and I am sure that the Betors came with 100 lb. springs. I expect to prefer the lighter springs.

After all of these successes with the CR I had to go for a ride. Things did not turn out perfectly. I rode out about ten miles from my house along some dirt roads and the beach. At my turn-around spot the CR did not seem particularly interested in idling. I pressed on keeping the revs up. About three miles from home, I was left with nothing about a very rough idle. I made it home and the next day I took the carburretor apart expecting to find a thoroughly blocked main jet...that was not the case. I did a ultrasonic clean and put everything back together.

On the trail the day before,  I had discovered that the plug cap was very loosely attached to the spark plug. Back home I replaced the original cap with one of my NGK units which I much prefer. It appears that the plug cap was the problem. I had discovered that there was nothing wrong with the carburretor, and when I started the bike after going through the carburretor and replacing the plug cap...all was well. One more long ride will give me an answer. What I really do not want to do is start chasing some heat related ignition problem. We will see.

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