New to me PK 70.

[90nut]

Made a road trip to Kansas City to pick up this little guy. PK suspension 70. Needs a front axle made, I should have that made this week. It runs but not that great, I'll work on that when I can ride it or just push it outside easier!

[Jwheeler]

Very nice score.

[John jr]

Awesome score.

[Jmoozy27]

Where do y'all find these things?? Damn!!!

Nice find!!

[90nut]

I've been looking for one for a loooooooong time. I stumbled upon this and while the timing for me was wrong (going to have to sell something, and I'm not a fan if selling.) the price wasn't bad and I knew I'd be kicking my self if I didn't buy it. Very happy with my purchase so far.

[90nut]

227764227765

Has some numbers crudely scribed into subframe, not sure if that's factory or what. Also it looks to have had a label on the neck, kinda looks like something an auction would use or a bike shop to keep stuff inventoried. Just things I have noticed while looking at it. Going to clean up the supertrapp tn and paint it tmrw.

[Daddio]

Very cool!!!

[90nut]

Got the axle turned tonight, painted the exhaust and fiddled with some other stuff. I'll post pics of the new and improved axle in the morning!

[Mr. Clean]

AWESOME!! Thanks for sharing!!

[greenhuman]

PK used to make some good stuff. Their 200X pipe was one of the best out there.

[90nut]

Turned a new front axle and spacers the other night, wire wheeled and painted the pipe. Its a super trapp but the muffler is welded to the head pipe, kinda crappy but the pipe is beat up anyways. Fits and works fine for now and doesn't leak, plus can't see the welded joint with the plastic on!

Still wouldn't run very good, checked the float height, it's high but has a plastic float (didn't want to wreck it and be sol.) so I didn't adjust it. Pilot jet was RUSTED SHUT. swapped it out and she runs quite well now!

Has a pep shock on it with a 180 lb spring, need to redo the forks. They are beat! One has some fairly heavy pitting on the lower tube however. Over all I'm Happy happy. Good couple days in the shop!

[Daddio]

PK used to make some good stuff. Their 200X pipe was one of the best out there.
Didn't they also make BMX bikes? My son used to race a PK Ripper about 22 years ago.

What diameter are the fork tubes on that?

[torker]

Awesome suspended mini. Looks like is very well made. Enjoy the ride.

TORKER.

[90nut]

Yea, same company that made the ripper bmx bike! Just a guess since I haven't measured the tubes, I would say around 27mm.

[torker]

I was very deep into bmx in the 80's (hence my life long nick, TORKER) never knew PK was into this type of thing...
Learn something new every day...

TORKER.

[redsox]

super cool lil' rig. nice score.

[dabody69]

Yea, same company that made the ripper bmx bike! Just a guess since I haven't measured the tubes, I would say around 27mm.

P.K. stood for Perry Kramer, the company was SE Racing, SE stood for Scott Enterprises, they did not make aftermarket frames for 3 wheelers..

[90nut]

Update, put a trail bikes full 88 kit on this little guy. Can not get it to fire. I've checked and rechecked timing, valve clearnce, spark. Valves set at .oo2 per the book, bright blue spark, but according to my plug checks it's not getting fuel. Bowl is full, jets are clean, (New carb with the kit.) Any ideas? I don't get what's going on here. Thanks for any input.

[shortline10]

Compression check ?
It won't draw in the fuel if their isn't enough compression .

[the tecate kid]

Do you want to sell it? Bring it to trikefest

[Joseph Farrow]

I have an idea..... since you are having so much trouble out of it you can just let me have it. haha
No super find. Dont give up on it. Would be a blast to ride when finished. You really need to do a 108 stroker motor. I had a friend when I was growing up who had one and it would scream!

[90nut]

It's not for sale! I have not done a compression test yet, should be good, everything is new. And I plan on putting the stroker crank in there this winter, I was being frugal when I ordered the parts!

[Joseph Farrow]

Is your plug dry after you try to start it?
I would shoot a little gas directly into the carb and see if it hits.
Sometimes it needs a little help to get the juices flowing.

[90nut]

Yes, the plug is dry after trying to start it. I put a shot of gas in cylinder and didn't get anything out of it. I am 99% Sure timing is spot on, have not done compression check as I need to get the correct adaptor for my snap in set. I'm kind of at a loss here

[Blown 331]

That thing is awesome! Have you tired to adjust the points? I've had similar issues with bikes with a basically non existent point gap.

[90nut]

I have not adjusted the points. I have thought about it, but the lil bugger throws off a spark that's as bright as my mig welder touching off. Just a diff color! It's on my list however. Before, (stock motor,) it ran but was an absolute dog. Used my buddies compression tester and I only got 85-90 psi. Tried adjusting the valves, but the inspection plugs were froze solid. By the time I got them out the threads in the head were about pulled out. So I have a lot of new items here to diagnose and test.

[Blown 331]

Well if it ran before it should run again but to me a doggy 70 screams point adjustment. As they wear the gap narrows and that retards the ignition timing. The point gap is the only ignition timing adjustment these have. Have you tried to spray a little bit of gas and back of the carburetor? I have a couple 70s that do not like to start after they've been sitting. I haven't really torn into it yet but I suspect they are lean on the pilot.

[90nut]

Yea, I get nothing when I shot gas into cylinder and it carb. Plug is DRY. going to pull the flywheel and check timing here soon. My ambition is kinda low after work here this week!

[Blown 331]

The flywheel actually opens the points so the flywheel needs to be on when you check them. So it's a little less work this way. LOL. You just pull the recoil and recoil cage and look through the flywheel.

[90nut]

Oh yeah. Duh. I've got a manual so I'll double triple check before my sleep deprived self dives in. Waited till Sunday to do the engine work.i was to tired in sat!
Is the ignition timing adjustable or just the point gap? Dint have the book in front of me.

[Blown 331]

Ignition timing is basically non-adjustable. But widening the point gap does advanced it, and narrowing it does retard it. Personally when I set the point gap on them I set the gap as wide as possible while still allowing it to have spark. Which is the most advance you can get out of it.

[90nut]

Spent a little time in the garage tonight, point gap is around .016 at its widest point. Kind of a finicky beast to check. Spark is not as bright as I thought, more of a white arc. My ignition timing is spot on, I have 170~lbs compression. Still does not appear to be getting gas when I pull it over. And it won't pop if I spray gas straight into cylinder. Is my spark to weak with this new high compression engine? Is it worth putting in New points or should I just convert it to electronic ignition?

Hobbies are fun....

[Blown 331]

It sounds like you have all the bases covered. I'm sure it's something simple. Have you tried using a new spark plug? I have had terrible luck with the NGK resistor plugs. I've had them where they have spark when not in an engine but lose spark when exposed to compression. I only buy the NGK non resistor plugs now. They seem much more durable and longer-lasting.

[gimmeamidget]

Give it a few drops of gas right in the spark plug hole and pull it over. Spraying in the back of carb is pretty much same thing. I suspect an issue with timing....I know you checked it twice but if it's sparking and your spraying gas it should at least pop. Is it backfiring or popping off at all?

[gimmeamidget]

If timing is off it will cough and sputter and backfire but won't run.

[Joseph Farrow]

I vote trying a new plug.

[kiser]

Very cool bike!! I'm also saying try a new plug. I have had the same problem as metioned by Blown331 about not firing under compression. Good luck!

[90nut]

It's alive! Told it I was going to trade it off for a Yamaha and she fired right up.

On a serious note, after I quadruple checked everything, I threw a new plug in it and it fired right off. Second time a spark plug got the best of me. Time to do some heat cycles and check the plug out for jetting purposes. Oh, now I have to fix pull start, one of the pawls is stuck out. Started it with a CORDED drill! Thanks for the input guys. Would see some of you at TF but my grannies 90th birthday party is Saturday. Can't miss it.

[Blown 331]

Nice! NGK resistor plug strikes again! I'll never buy another one. I only by the NGK non resistors.

[90nut]

:beerIt's got one in it still, but that will change as soon as I make to parts store. Pull start fixed, test ride in the books. Fine tune her when the rain stops