triumph first start up after rebuild need help

5586 Views 20 Replies 15 Participants Last post by RidingHood, Jan 14, 2013

honkytonking

Discussion Starter · Jun 17, 2012

Ok so what im working with here is a 64 t120 bottom end completly rebuilt by myself (first time ever rebuilding a motor) and a 71 top end twenty over with the head rebilt by wes new pistons and pushrods stock cams. So here is the problem im trying to fire her up and have it wired with a boyar eletronic ign and a mighty max blabla ya know the usuall stuff to run with just a battery or a condencer (sp) any way im getting tons of spark to the spark plugs just rebulit the carbs and still getting a pop bang !! almost wanting to start and then the next few kicks nothing. I set the timing played with that a bit and set the gaps in the valves about a thousand over 2 and 4 for the break in. so where do i go from here my gusess is check the timing again for the 5 time any other ideas thanks

1 - 20 of 21 Posts

bp131

· #2 · Jun 17, 2012

Try switching the wires on the boyer plate where the points used to be.

Goldy

· #3 · Jun 17, 2012

Make sure your Boyer is wired properly too...that is as far as positive and negative goes.

Back_Alley_Garage

· #4 · Jun 17, 2012

Sounds like a timing issue if you say your getting spark. Did you set the initial timing using the TDC crankcase plug or did you use the marks on the stator rotor? When you rebuilt the carbs did you clear out the pilot jets with a fine wire?

honkytonking

Discussion Starter · #5 · Jun 21, 2012

i used a timing wheel off the cam tried switching the wires to the boyar. any way to check the boyar and the componts in the system to see if thats my problem. Or sell me a good mag hahah for cheap !!!! in getting slightly fustrated thanks

Loffer

· #6 · Jun 21, 2012

Make sure the boyer is set at the advance hole. 38*btdc.

Glider

· #7 · Jun 21, 2012

Switch the plug leads and see what happens.

Dan Boy

· #8 · Jun 21, 2012

Glider said:
Switch the plug leads and see what happens.

What I was thinking when I read your post. Also this might help...

Cheers Dan.

See less See more

HCC

· #9 · Jun 21, 2012

I don't think switching plug leads will do that much because it is a dual fire system. Try switching the leads on the ignition plate. I did this on one of my bikes (switch the wires when I was wiring it), and it changes the timing just a bit (don't remember how much), but once i had them properly hooked up, it fired right up.

kbg

· #10 · Jun 21, 2012

honkytonking said:
i used a timing wheel off the cam

The cams spins half speed of the motor!
Put the degree wheel on the crank.

Loffer

· #11 · Jun 21, 2012

kbg said:
The cams spins half speed of the motor!
Put the degree wheel on the crank.

I was thinking he meant the crank...

bp131

· #12 · Jun 21, 2012

Depends on the degree wheel. This one screws onto the cam. I don't think a 64 will have the TDC plug thingy So use a depth gauge or some sort of measuring device to find TDC in the spark plug hole. Does your boyer plate have two holes? Make sure your using the correct one. Check for air leaks. In all the excitement of your first build, it's easy to overlook the smallest of things. It's a process of elimination but eliminate one thing at a time or you can run yourself in circles.

See less See more

honkytonking

Discussion Starter · #13 · Jun 23, 2012

the thats the wheel i have and the tdc thingy on the crank is not there. so a nother day to check it out im figureing things out as I go thanks for the help ill keep ya posted. Is there any way to test the black box to see if it works the way its suposto. Oh and my boyar did not come with any instructions so i was using the hole that says cw timing thats the correct hole ?? mitch

bp131 said:
Depends on the degree wheel. This one screws onto the cam. I don't think a 64 will have the TDC plug thingy So use a depth gauge or some sort of measuring device to find TDC in the spark plug hole. Does your boyer plate have two holes? Make sure your using the correct one. Check for air leaks. In all the excitement of your first build, it's easy to overlook the smallest of things. It's a process of elimination but eliminate one thing at a time or you can run yourself in circles.

bp131

· #14 · Jun 23, 2012

Its the hole with the red dot.

See less See more

swooshdave

· #15 · Jun 23, 2012

honkytonking said:
the thats the wheel i have and the tdc thingy on the crank is not there. so a nother day to check it out im figureing things out as I go thanks for the help ill keep ya posted. Is there any way to test the black box to see if it works the way its suposto. Oh and my boyar did not come with any instructions so i was using the hole that says cw timing thats the correct hole ?? mitch

If you have spark then the Boyer is working. Comes down to timing.

How did you find TDC the first time? You did not mention.

EvilCenobyte

· #16 · Jan 14, 2013

I am having the same problem with my triumph 650 motor. I have just finished rebuilding from the sludge trap up and I spent 5 hours in the garage today trying to fire the engine and mess with the timing. honkytonking, when you say that you are getting tons of spark to the plug do you mean that you are getting an excessive amount? I'm getting 3 sparks on the downstroke of the pistons and another 3 sparks on the upstroke. It's really throwing me for a loop. Any tips or tricks would be appreciated.

Tony the torch

· #17 · Jan 14, 2013

A Boyer goes into full advance when the supply voltage goes below 10 volts and completely malfunctions below that. the voltage on a non running bike with a Mity-Max is too low when you kicking it over. Boyer's don't work well on a "no battery" bike.

in the alternator, Did you ever replace the rotor (magnet wheel) ?

Hook up a good 12 volt battery to in a try it again.

lippy

· #18 · Jan 14, 2013

You say you have tons of spark, but what color is the spark? Blue fine, pink it won't run. Lippy

Daddy Boy

· #19 · Jan 14, 2013

This will set you straight with the boyer man.
http://www.tioc.org/boyer/boyertestnewweb.htm

Tony the torch

· #20 · Jan 14, 2013

connect up a battery and get it tuned in and running well, then you can try running it off of the Mity-Max.

1 - 20 of 21 Posts

This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.

Top