Topic: Honda Cl100 wont start, after running the night before.

[dylanw]

I have a 1973 Honda CL100 which hasn't been running the best but still starts. but today i couldn't get it to fire at all. i check for spark it was good, i checked compression and it is good as well. and i just put a new carb on only a couple days ago. the first couple kicks i tried it would backfire very loud. I then tried starting fluid and now nothing was happening at all. after this i thought the ignition timing was off maybe so i used a test light and set the points so when it went over the F mark on the flywheel the light would turn off like it says in the manual. i also attempted to make sure the valve timing was set properly. i lined up the t mark on the flywheel and the O mark on the cam looked to be off very slightly so i moved it over one tooth and checked again but now it was even further off so i assumed how it was before was correct and switched it back.
Any help would be greatly appreciated. Thanks

[bryanj]

The light should come ON when the F mark lines up rotating engine the correct way. Points gap first at 0.35mm 14 thou

[WhyNot2]

How's the battery?

I had to install one of these to get mine to run.

[dylanw]

How's the battery?

I had to install one of these to get mine to run.

i got the battery new around a month ago and what is that in the pic?

i will try and adjust the points gap. but later today when i was messing with it some more and it started to backfire again but not as load.

[WhyNot2]

That's the rectifier.

The one on the bike is square and red, down by the battery.

[dylanw]

So after i adjusted the points the bike sound like it wanted to run but never quite got there. So i decided to try and bump start it and it started up. but it didn't want to rev up very high it was like it was hitting the rev limiter.

[dylanw]

Ok so after it ran yesterday and let it sit over night i doesn't want to start up again even when i try to bump start it. what would cause it to be extremely difficult to start when its cold. Thanks

[dylanw]

I got the bike to run and idle the best its been since i have owned it. It was a combination of the ignition timing being off and the points gap was off as well. Even though i set the timing with a test light and when it hit the F mark the light came on i still had to move the base plate of the points clockwise about 15 degrees and then it fired right up.

[WhyNot2]

Good going, glad to hear you got it running.

Can you post a picture of it?

I'd like to see it. I really like these little things.

[dylanw]

it pretty rough

[dylanw]

After i got it running good i wanted to see the top speed. But it didn't want to rev out in 4th gear and in 5th gear i was actual losing speed. it was also hesitating at WOT when i was in 4th gear. I think it might need a larger jet but i am not for sure.

[WhyNot2]

Looks purdy good..........haven't been able to put mine on the road yet.

Right now, it's a back yard toy.

I'm really thinking that rectifier might need to be changed out.

But, that's my opinion, not an expert, by no means

Mine:::::

[dylanw]

I guess i forgot to tighten the lock nut. I believe this is why it wasn't wanting to rev out in higher gears.

[WhyNot2]

I guess i forgot to tighten the lock nut. I believe this is why it wasn't wanting to rev out in higher gears.

Oh, wow........did it mess anything up?

[dylanw]

Lucky i don't think so, i think it got caught at the bottom of the oil pan near the filter.

[Bodi]

Too many years ago on my '65 CB77 (around 1971?) I was quite far - 250km or so - from home when a tappet I had apparently left too loose dropped into the oil pan. I hadn't yet been brave enough to open the cases and limped home on one cylinder (and a LOT of clacking) to my mechanic/guru who dropped the oil pan and retrieved the parts. Nice (but tense) tour on back roads of the countryside I had bypassed via the highway. No serious damage done except to my pride, a quick look into the tappet cover would have found the problem.
Unlike the e-z-strip case bolts going into alloy, those tappet nuts need to be tightened securely... to where you thing the wrench is about to bend.

[grcamna2]

Glad to see you found those.How's the condition of your ign. points ?