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  #1  
Old 17-06-2012, 01:52 PM
rattrike rattrike is offline
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Default reliant 850 trike running problems

as above i have an 850 reliant super, turned trike
it ticks over sweet as, but bogs down as soon as you open the throttle backfiring through the carb and farting and pooping but once the revs pick up it's sweet as a nut
untill you put it in gear that is, and try to pull away when the whole popping thing starts again

any ideas would be much appreciated as it's doin my fucking head in
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Old 17-06-2012, 05:00 PM
johnr johnr is offline
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you checked that the auto adv/ret works ok on the dizzy? check that the tube between the carb and the dizzy is intact, and that the unit woks ok.
( this assumes that your carb is clean, your plugs gapped correctly, your ignition timing is spot on, your points are clean and gapped, your condensor is ok, )
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Old 17-06-2012, 05:24 PM
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harry harry is offline
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Should be an SU carb on the 850 engine.

Make sure that the dashpot damper has the right amount of engine oil in it.

When you push the plunger back in you should feel resistance.
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Old 17-06-2012, 06:53 PM
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Have you set the ignition timing as per the Haynes manual at 0 degrees advanced?


If so, throw the book away and time it correctly at 10 deg. BTCD
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Old 18-06-2012, 10:22 AM
rattrike rattrike is offline
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thanks for your replies, almost there now just needs a little tweek and she'll be good

@johnr
pretty sure the adv/ret works ok, done the plugs, points and condenser which were all supposed to have been done recently and were all way out No2 plug was only finger tight as it's a job doing it up with the dizzy in the way so they never bothered

@harry yes it,s an su carb which was filthy and looked like an exhaust pipe with all the farting and popping but is now squeaky clean, i did only use 3in1 oil in the dashpot damper so might try engine oil as it's thicker and will give more resistance

@happybiker will give that a go as we set it to 0deg then adjusted the dizzy (turned it) and as i said the trike is now 99% there running pretty smoothly just the odd hickup so this could fix it

will keep you all posted (know pun intended)

Last edited by rattrike; 18-06-2012 at 10:28 AM.
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Old 18-06-2012, 05:50 PM
johnr johnr is offline
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you can check the vacuum adv ret works by taking the top off the dizzy, and unplugging the vac pipe from the carb, give it a suck, and you will see the adv ret move!
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Old 25-06-2012, 07:22 PM
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addjunkie addjunkie is offline
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I had similar issues with a reliant, did the 10degrees before tdc........

Then noticed, when spinning it with dizzy cap off that the bit the points runs on was running slightly eccentrically due to wear. opened the points gap slightly and it ran like a dream.

Weird I know.
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Old 26-08-2012, 04:30 PM
rattrike rattrike is offline
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Default reliant 850 trike running problems

ok not replied for a couple of months as the motor self destructed
we've been hunting down another one (for 1 read 2)
the original we could never get to run just right, no amount of adjustment on the carb or dizzy would see it run fine through the rev range, then the shit hit the fan in the shape of a massive explosion which blew the rocker gasket clean out along one side and end of the cover, and that was that turns out number 4 had a hole in the piston which had filled the crank case with fuel and on the next start-up it blew strait up the push-rod tubes like a goodun and took the gasket out

got a donated 2nd motor with a snapped rocker, stripped it down and this one had a hole in number 3 piston, (is this a common reliant problem, 2 motors, 2 blow pistons)

now to the main question after the comedy of errors
we brought another motor, (which is all up together, and a runner so they say) seems to be a goodun but this motor has electronic ignition, not the converted kind but a proper lucas jobbie, with 2 wires coming out the dizzy, 1 being the permanent live to the electronic unit (from the coil) the other the signal wire (from the coil)
is this right ?

so

q1 i take it we have to get another coil to work with the electronic dizzy
but what sort
iv'e read on here somewhere the contact breaker type coil don't work with electronic dizzy so which one does ?

any help would be much appreciated before i blow number 3or4 ventricle

Last edited by rattrike; 26-08-2012 at 04:44 PM.
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  #9  
Old 18-12-2012, 06:53 PM
john j john j is offline
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Default reliant

a lot of reliant problems are down to ignition hence piston holed get an electronic conversion off ebay about 30 but well worth it set up the timing spot on when installing an should have no more problems
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