1979 Can Am 250 Qualifier II questions?

Rebuilding a 1979 Can Am 250 Qualifier II, and have a couple questions, if anyone knows the answers?

1) This bike has an oil tank but doesn't seem to have any oil injection lines or cable hole in the engine case:

27072643_10155902830425803_3969313113345

Did the 79 Qualifier come without oil injection or is it possible this is an MX engine?

2) This particular bike came with an alloy swingarm that looks much different than the 1980 and later arms. Know anything about it?

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27331707_10155902824640803_6490746641965

As seen above, it has a cable actuated rear brake (instead of a rod actuated) and a different chain guide system. It also gives the bike a higher ride stance and more rear travel. Is this an aftermarket swingarm or a factory option, or possibly of a different year or model? 

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I haven't pulled the left sidecover off the engine to see if it has an oil pump. It has been a lot of work on the wheels and brakes in an unheated shed to get it this far. Brakes and clutch are working, I actually put the pipe on and started it tonight. I really need to know if this is an oil mix or oil injection motor. The frame tank looks like it was used in the past but there doesn't seem to be anywhere on the engine to hook it to.

I believe that is a CA 1982 qualifier 4 swingarm & shocks. I also believe that is a non oil pump engine, may also be from a newer Qualifier. If l recall correctly the oil pump engines should have a 2 part left side engine cover.

Thanks GB, I do have a 1977 spare engine with the 2 piece cover. The swingarm has a cable and fittings for a cable actuator on the left side and doesn't quite look like pictures I've seen of 1980+ swingarms. They look like this: 

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This is mine:

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1982 CA Q4

630407691.jpg.ed1b1946a2b92f6903ee6627cea4edb0.jpg

The rear hub is totally different to the usual. The original Can-Am wheels have the drive sprocket and brake drum on the right side.

Your picture seems to show the drum on the left. Hence the additional cabling and brackets.

No question that swingarm is NOT oem for the '79. Skeptical about the shocks also. Wife had the '79 175 and it had a steel swingarm.

You guys have all absolutely nailed it. Engine is a newer, possibly 1982 pre-mix that probably matches the swingarm, because it was too wide to fit in the 1979 swingarm.

27539987_10155919455650803_3808508015541

No problem, ground to fit the inner bushing flanges to fit. Have no power in my little shop so had to buy a battery operated grinder to accomplish the task. FINALLY have the proper swingarm into the bike. Would you imagine the aluminum swingarm is a kg heavier than the steel arm?

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Bike is getting close to running. I had it for a drive the other day. Silencer made, some wiring to do now. My shed is a 100yr old horse and buggy shed in the city downtown. No power or lights. I geared up a woodstove and LED battery operated lights, and a Colman gas lantern. Just built a new bench to do some engine assembly. Conditions may be rugged, but I try to make the best of it...

27972612_10155933265470803_1648075680920

 

12 hours ago, sbest said:

You guys have all absolutely nailed it. Engine is a newer, possibly 1982 pre-mix that probably matches the swingarm, because it was too wide to fit in the 1979 swingarm.

27539987_10155919455650803_3808508015541

No problem, ground to fit the inner bushing flanges to fit. Have no power in my little shop so had to buy a battery operated grinder to accomplish the task. FINALLY have the proper swingarm into the bike. Would you imagine the aluminum swingarm is a kg heavier than the steel arm?

27749911_10155933259850803_7714704244663

Bike is getting close to running. I had it for a drive the other day. Silencer made, some wiring to do now. My shed is a 100yr old horse and buggy shed in the city downtown. No power or lights. I geared up a woodstove and LED battery operated lights, and a Colman gas lantern. Just built a new bench to do some engine assembly. Conditions may be rugged, but I try to make the best of it...

27972612_10155933265470803_1648075680920

 

You are showing true grit, I admire that. The next round is on me.  :thumbsup:

Edited by YHGEORGE

Great job w/your Qualifier. Rare birds they are. Good luck and safe riding.
I'm a proud owner of an 82 400 IV. Purchased from the original owner w/very low mileage/hours. Did the complete frame off refurbishment. Super strong compression. It's a bitch to start.20180129_171500.jpg

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Glad I found this photo.

Thanks for the likes.
I haven't run this beast in over a year.
Medical issues .
I'm giving it the once over for a possible run next week. 🤞I can make it live again.
The Original owner's manual indicates the fuel mixture of 20:1 ratio, , as I've used in the past.
With the new oil technology does this still sound practical?
Thoughts and wisdom please. Thanks, ,
PaydayGabe in Vegas.

I would stay at 20:1 Gabe. I've done some experimenting with 50:1 to 20:1 synthetics (Ipone, Motul) in chromed Chinese 2 stroke cylinders and found that no matter how good the oil the chrome would not survive with less than 32:1 oil. With our iron bore Blasters my son and I found excess wear at 40:1 and have gone down to 32:1 with synthetic. Castor oil (Maxima 927) seems to work best at about 24:1 in the Blaster and the Chinese chromed cylinders. If the manual called for 20:1 in 1982 while others were running leaner, I'd guess the manufacturer knows something I don't. Until I knew better I'd stick with their advice.

Gabe, that is a beautiful bike. Wonderful job. I don't know why you are asking me for advice, you obviously know your stuff! 

Thank you for your consideration.
I'm gonna stay w/the 20:1 formula for now.
Thought I should ask?
Giving the old beast a service and gonna try and run it soon.

It's a peach! Wish I could ride it more often. Once I get my strength back, hopefully I'll be on the pipe!
Time will tell, , shit will smell!
Hopefully I don't stink.

All is good in the neighborhood .20180218_145857.jpg20180218_145857.jpg
Smells wonderful. Beautiful blue smoke .

Some pics out in that sunshine would have been a little better after all that work.  :facepalm:

Had the old girl out for a ride today. I too forgot to take pictures out in the sun:

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Still a few bugs. Had to tear the fueltank off and replace the petcock. Rerouted cables and wires too while I was at it. The goal is to get it running and reliable and ride it this summer. Will likely do more of a restoration next winter once the problems are ironed out. Makes me appreciate my other orange bikes. :)

 

Edited by sbest

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