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'70 shovel problem

Started by anguscraggin, June 04, 2011, 02:58:18 PM

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anguscraggin

Hope someone can shed some light on this one for me.  1970 shovel head, got the engine put back together last summer and put about 50 miles on it.  It fired right up after the assembly but after a few times trying to crank it, it got harder to start.  When trying to crank it, the starter turns and the engine starts to pick up but at barely no more RPMs than the starter motor is turning.  Once you release the starter button the engine wont catch and I know something is off in the timing or something. I dont have a timing light so I havnt checked that possibility.  Its sat since last summer because I just havnt had time to fool with it because of a new baby, finishing college and working during spare time, as if I had any!  Any input will be welcomed. 
Thanks,
Angus

Reddog74usa

Do the simple stuff first. Check the battery, points gap, ground cables and see if it's getting fuel.
RIDE IT LIKE YA STOLE IT

Tobias

In addition to what Reddog said...

Since it has sat for a year the fuel is bad and the carb may be gummed up.
Dump the fuel, clean the carb.

If the battery has sat for a year without being on a charger it won't have enough life to start.  Check the water levels, put it on a charger overnight and give it another shot.

If it runs at all put a volt meter across the battery terminals and see what it's putting out.
Should be over 13 volts at 2000 RPM.

Lots of skilled guys on this board, somebody will post a solution

War Horse

If it did this last summer after 50 miles of riding, I would think your break-in didnt go well.... :nix:
A clear conscience is the sign of a fuzzy memory

easyricer

50 miles after the motor was opened up..... If you didn't retorque the heads, it's very possible you are loosing compression through the head gaskets and that gas will have to go! More than likely, like mentioned the gas is bad and the carb is gummed up. I'll also guess at a bad condenser and possibly bad coil wires.
EASY
Just ride the damned thing!

jack744

Valves might be sticking open ,not enough to bend but enough to loose compression.

dablaze

Look up the directions on static timing, that should get you there for now. I can't remember the procedure.

Craig

Hillside Motorcycle

Does it have solid lifters, or a solid lifter conversion??
Scott
Otto Knowbetter sez, "Even a fish wouldn't get caught if he kept his mouth shut"

motorplex88

If you pull your carb for cleaning check your intake manifold seals and fitment while your there. Agree with all the stuff the other gents have recommended. A quick compression check will tell ya enough to know if you got valve related or head gasket issues. No compression, No bang.

Hillside Motorcycle

Reason I asked about the solids, and on a fresh valve job, the pushrods can get tight, after initial run in.
Re-torque base nuts, head bolts, and re-adjust the valves if so equipped. :smile:
Scott
Otto Knowbetter sez, "Even a fish wouldn't get caught if he kept his mouth shut"

nw69fl

First thing, never neglect your shovel by letting it sit around and not being started once in awhile. They are meant to be run. Take the time to get to know all the special little tricks to keeping it happy.

anguscraggin

Update to the '70 shovel problem.  To address speculation;  I drained the gas out of the bike before I stored it.  I retorqued base and head bolts after heating it up and putting a few miles on it.  I gapped the points and checked and tested all the ignition components.  I put about 340 miles on it not 50(sorry, my bad).  I intend on changing the oil and filter @ 500 miles as the top end has been completely replaced(valves, guides, rocker arms & shafts).  I am running solid lifters in it, always have since I bought it, I know they're noisy but I like 'em. The carb is an S&S superE on an S&S bottom end. 
I cranked it up today(first time since last year) after replacing a bad coil, it was hard to start and didnt sound right.  It did the same thing thing; it started but it took a lot out of the starter and battery.  I seems to me I need to reset the timing but I dont have a timing light or a tach, so Im checking all my friends tools kits for a timing light.  Wish me luck.

Angus

dan winright

static timing.pull both spark plugs.makes the engine roll thru easier.set front cyl to top dead center,on exhaust stroke. remove timing plug,there you should see a line on the flywheel.it should be centered in the hole.now,go to the points cover,remove it.your points should just begin to open. if they arent,reset gap,loosen the stand offs stick a ciggarette celophane between the points contacts,and turn the backer plate till the celophane easily pulls thru. put it back together and ride the damn thing.     that should do it for ya,   dan
if it hurts real bad,cost more than its worth,youve learned a good lesson.

War Horse

 :agree:, static timing is actually a better way to do it, most times the oil behind the clear plug makes it hard to see and the mark is bouncing all over the hole. BTW I used to set all my builds up on the bench, with the line more towards the front of the hole. Just what I did and everyone has a preference....
A clear conscience is the sign of a fuzzy memory

Snuff™

Bottom end is probably full of oil.  Put a pan under the crankcase breather hose.
Every day, I'm one day closer...  WTF!  I'm not near 70 yrs. old!

alstar2

when you static time it,i believe it should be at full
advance.to do this i have an old set of pliers that i
ground out to reach around the point cam bolt & rotate point
cam to full adv. & just open points with time mark in window.
if you have an ohmn meter put it on the point wire & ground.
   Al

easyricer

War Horse got the trick..... put the line in the front of the hole, you won't have to mess with trying to keep the timing advanced. Make sure you get the gap right and even first. Should fire up in 3 kicks.
You can leave it there if it fires and runs ok. What I do after that is take it out for a ride, advance the timing in small increments until I hear the motor "ping" under heavy load, then back it back off until it goes away. Every motor is different, so where you're timing will ultimately land is anybodies guess. The timing light can only tell you where it's at, not where it needs to be. Today's fuels require different timing than the leaded gas our bikes were designed for.
The static timing is just a start point, just like the 1 1/2 turns out on the fuel mixture (for an S&S carb), just a start point. I rarely ever have a motor that stays on the initial settings.
EASY
Just ride the damned thing!

76shuvlinoff

 :agree:

Even on my electronic sparker that's about all I do, advance it till it pings and back off till it doesn't. The guy that wrote the book telling us how to do it looking through the timing hole on a running mill is probably still laughing in his grave.

Critics are men who watch a battle from a high place, then come down and shoot the survivors.
 - Ernest Hemingway

easyricer

The guy that wrote the book telling us how to do it looking through the timing hole on a running mill is probably still laughing in his grave.
:hyst: :agree:
YEARS ago I bought a card full of those little clear plastic timing plugs, in 10 years......I sold one! (to my brother)
EASY
Just ride the damned thing!

76shuvlinoff

Easy,
the only time I tried to time mine with a light was early in my shovel years and a buddy who knew all there was to know about anything was going to show me how it was done. We read the book, didn't have a clear plug or a friggin clue. He's all lined up on the hole sighting down his timing light and tells me to "hit it". Bike fired right off....... and I think he is still spitting oil.

I knew he was spitting mad as I fell over laughing trying to get the hell out of his garage and his reach.
Critics are men who watch a battle from a high place, then come down and shoot the survivors.
 - Ernest Hemingway

War Horse

I still have one in my tool box, I keep to loan to the young know it all's, they allways return it and say "what a piece of sht".... :pop:

I do enjoy saying ,I told you so....... :soda:
A clear conscience is the sign of a fuzzy memory

dablaze

I have used my clear plug a few times when I have someone to give a hand...it is a pain, but if you paint the timing mark with fluo or bright white paint and if you dim the lights right down in the room, and if you weren't with the palm sisters the night before...it can work!

Craig

motorplex88

The best use for them clear plugs is when someone rolls in your shop and has the timing hole plug stripped out. They can jam one of them dudes in there to get em home.

Snuff™

Take the clear plug and use a piece of 1200-1500 grit sand paper, remove those spirials and it will be like a clear piece of glass.  Did it about 10yrs ago, but haven't needed to use it yet. :hyst:
Every day, I'm one day closer...  WTF!  I'm not near 70 yrs. old!

anguscraggin

I appreciate all the posts guys, but I need some more info.  How do I get the front cyl at TDC?  This bike has an S&S bottom end and the timing marks on the flywheels are different than a stock HD mill, I can see an "F" with a line next to it and a "T:F" in a different spot on the flywheel through the timing hole.  I tried following Dans instructions on static timing and I thought I had the front cyl @ TDC but I couldnt see s*#t through the GD timing hole and I cant find a f-ing thing on the web that tells me what these marks mean.  Thanks guys for your input.
Angus