First slip on cold engine.
I wanted to grab some opinions from some of the old timers. Lord knows I have been working on becoming a knuckle-dragger learning on this machine and as I have gone along; I've tried to speak of any of the mods I have done to my First generation Rebel. And they are all pretty well documented here in this forum from the highway gearing to the LED light conversions. Some of the maintenance and scheduling of maintenance that has evolved differently than manufacturer suggestions has been less documented but doesn't include too drastic of changes from the accepted norms. Mostly it is more frequent oil changes especially as warm as my bike runs with the highway gearing, that made much more frequent oil changes mandatory. I kept bumping it to more frequent until the oil wasn't getting too dark or too thin at changing time. Using the conventional 10w-40 oils that had settled into around every 800 miles (I had been targeting every 500 for changing) as my clutch was already into high miles this last summer I decided to try to thicken my oil. I started using a conventional 20W-50 and it seemed to help and I bumped my oil changes back to 1K miles and I was pleased to see the oil not too dark or too thin as it drained. The clutch demanded replacement a little before the end of the riding season.
Now I tend to ride some year around. I jokingly say If I can't be frost bitten lets ride. But truthfully in my old age I find that my scally-bark hide aint thick enough for my Eskimo suit to do enough good at temps lower than the high 30's. Living in the south that means I ride some in the dead of winter. And so my bike has had a bit more than 3 K miles put on it since that new clutch went in. Earlier this week I changed the oil, re-tensioned the chain and reset the rear brake like I prefer it before taking her out. I cranked up, allowed her to warm up about a minute and started her off the hill I live atop. After I hit high gear going down the hill she suddenly broke loose and slipped drastically. It was very sudden. RPMs jumping like a rocket. I backed off the throttle and caught her, re-engaged the clutch and she went on with no more slips that ride (but admittedly I took it a bit easier on her). I thought about what had to be the problem with the bike and decided to warm her up really well before pulling out to allow my oil to thin out as much as possible before putting her to work. So the next day (yesterday) I pulled her out and left her at an idle for several minutes and went in got my trusty laser thermometer that I use to keep heating from killing her when I'm on a trip and know her RPMs will be high for an extended period of time while running in high gear (when she really gets warm). My crankcase was reading 160 when I dropped her in gear and took off. No slipping all the way into town (Pulaski is 18 miles away). I picked up a pack of smokes and started back toward home very happy she had done that well. On the way back I wanted to see how easy it would be to make her slip at temperature, I had her a bit higher than 70 MPH when a quick hammering on the throttle again caused her to dramatically let go. So now I am thinking about whether I need to break open the crankcase and put some washers on the clutch basket springs to stiffen them up a bit (like I did when the clutch was well worn) and keep my heavier oil, or should I thin it a bit by putting it half and half using both 10W-40 and 20W-50 and re-test her performance.
What do you guys think?
I'm just knockin' around on me 1986 CMX250C Honda Rebel