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Discussion Starter #1
I just bought a trx 350 1990 fourtrax there is no spark and the only battery I have is a deep cycle can I use it to hook up temporarily and test for spark? Thanks in advance!
 

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You can use the deep cycle battery temporarily with no problem, but as you probably know, you will need to install a battery intended for ATV use for the long term.
 

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Yes I figured that but just to help diagnose the spark problem I wondered if I could use it rather then go buy a new battery thanks for the help!
 

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any battery will work for testing. oh, and that is NOT a 1990 trx350 bro ?, that is a 1986 or 1987, Honda does not see any models after 1989 state side ?, but they did sell them after 1989 in Canada ?, just not listed after 1989 in their parts fich :).
 

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Yes I read that somewhere on here that in Canada they made them until 1992 or 1993 but the 87-88 parts will fit ??
 

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Yes I read that somewhere on here that in Canada they made them until 1992 or 1993 but the 87-88 parts will fit ??
for the most of the parts ?, yes..they will swap out. BUT !!, some parts are different through the years. the front brake drums on 1986 will not work on any other model cept a 1986 !!. then they changed the left engine side cover, it has a breather tube on some models, others don't have this in the later years. the breather system changes, keep an eye on this !!. if my memory serves me right ?, the front pinion gear on the 1986 is different, from 1987 to 1989, they all are the same, but the 1986 is all on its own..lol. plastics from a 1986 ( front fender and grill ) are only for the orange sub-lights, they will not work for a fender that has clear sub-lights, the grill is different, as well as the whole front fender for the grill. racks, bumpers, all will swap,bolt on. rear fenders from the 1986 from the factory, as well as the front fenders, did not, do not come with holes for the racks ?, you have to cut them out for the racks to bolt up through them. the 1986 uses the battery to fire spark plug, where is, 1987 to 1989 all use the stator to fire spark plug. these are a few things that come to mind ?!..lol. can't remember if the ignition switch is different or not ?, ( wire wise ) .
 
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Discussion Starter #7
Apparently the one I have has an electric fuel pump and will not start with out the battery? I'm really looking forward to getting this bike! Lol
 

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Apparently the one I have has an electric fuel pump and will not start with out the battery? I'm really looking forward to getting this bike! Lol
all of the old school trx350's use an electric fuel pump to pump gas to the carb, the fuel tank is under the seat, lower than the carb :). they have a fuel pump, and a fuel cut-off relay :). if you just want to test fire the motor to see it if it will turn over ?, shoot some starting fluid to the back of the carb or air filter, then kick start it over, if the compression is great ?, it will fire over after a few kicks over :).
 
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