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Forums › Dirtbike Talking › Other Makes / Other Mechanical Questions / Tech Ideas › XR4 cannot start...HELP!!

XR4 cannot start...HELP!!
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kid_rizal
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Joined: 20-Jan-2004
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Location: SingaLaysia

PostPosted: Wed Jul 07, 2004 10:28 am    Post subject: Reply with quote

gd morning, afternoon and night bros...got problem need ur help...this morning i tried to start my bike after 3 days of not riding but i can't find the kick start compression...the kick starter seems to go all the way down and theres no resistance at all for me to kick start it...

check the engine oil its extremely low so i've top it up but still cannot start...off the fuel, use the decomp and kick start a few times...then i tried to start my bike again after tat still cannot ley...no resistance wat-so-ever from the kick starter...please help me...

izzit piston ring loose? if yes then how to fix? how much?

thanks in advance guys...if u guys know bout it and can help me immediately can call me 96451800-rizal...
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funnyloh
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PostPosted: Wed Jul 07, 2004 2:44 pm    Post subject: Reply with quote

agar the tdc point then try to start liow


same situation

need to open up engine to check



anthony
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kid_rizal
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PostPosted: Wed Jul 07, 2004 4:20 pm    Post subject: Reply with quote

thanks bro...i can't find the compression so i had to play around with the kick starter...then i finally able to start the bike but it died off soon after...tried again and again...

few hours later it finally start...but the engine and exhaust very very very loud...dunno y...after a while the engine and exhaust noise slowly quieten...warm it up for a while now its ok...still can't figure out the problem...will bring it for check ASAP...

got another question, if the bike been laid off for some time(lets say a week), can it be difficult to start?

thanks again for viewing...
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funnyloh
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PostPosted: Wed Jul 07, 2004 4:41 pm    Post subject: Reply with quote

if engine oil level is low, i suspect there is some leakage between the piston n there cylinder walls. result in oil burned.

better open it up real soon.

if wait any longer might haf more stuff changed..
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scykoe
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PostPosted: Wed Jul 07, 2004 11:50 pm    Post subject: Reply with quote

3 days never start?? Try opening the nut below your carb...i think its a size 14... SHould have petrol flowing out from the carb....Put it back...Pull yr decomp and kick start the bike for about 10 times....Then try starting the bike as normal...
Faced this problem before when didnt ride for 2 or 3 weeks...
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Labbit
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PostPosted: Thu Jul 08, 2004 10:09 pm    Post subject: Reply with quote

kid_rizal+Jul 7 2004, 08:20 AM wrote:
QUOTE (kid_rizal @ Jul 7 2004, 08:20 AM) thanks bro...i can't find the compression so i had to play around with the kick starter...then i finally able to start the bike but it died off soon after...tried again and again...

few hours later it finally start...but the engine and exhaust very very very loud...dunno y...after a while the engine and exhaust noise slowly quieten...warm it up for a while now its ok...still can't figure out the problem...will bring it for check ASAP...

got another question, if the bike been laid off for some time(lets say a week), can it be difficult to start?

thanks again for viewing...
For 4-stroke

If your engine is warmed up and you have white smoke coming out of e exhaust, then your piston rings need replacing.

Common to have white smoke while engine is warming up. But when warmed up, the exhaust should gas be clear.
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funnyloh
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PostPosted: Thu Jul 08, 2004 10:37 pm    Post subject: Reply with quote

scykoe+Jul 7 2004, 11:50 PM wrote:
QUOTE (scykoe @ Jul 7 2004, 11:50 PM) 3 days never start?? Try opening the nut below your carb...i think its a size 14... SHould have petrol flowing out from the carb....Put it back...Pull yr decomp and kick start the bike for about 10 times....Then try starting the bike as normal...
Faced this problem before when didnt ride for 2 or 3 weeks...
size 17
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new_dirt
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Joined: 05-Feb-2003
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PostPosted: Thu Jul 08, 2004 11:00 pm    Post subject: Reply with quote

kid_rizal+Jul 7 2004, 04:20 PM wrote:
QUOTE (kid_rizal @ Jul 7 2004, 04:20 PM) thanks bro...i can't find the compression so i had to play around with the kick starter...then i finally able to start the bike but it died off soon after...tried again and again...

few hours later it finally start...but the engine and exhaust very very very loud...dunno y...after a while the engine and exhaust noise slowly quieten...warm it up for a while now its ok...still can't figure out the problem...will bring it for check ASAP...

got another question, if the bike been laid off for some time(lets say a week), can it be difficult to start?

thanks again for viewing...
so did the "compression resistance" come back?

last time my XR250 had the same problem. kick starter can be pushed through the whole travel by hand. turned out the cam chain tensioner has broken into 3 pieces.

unless you left the bike out in the open exposed to the elements where water may get into the carb, 1 to 2 weeks of not starting will not cause major problems in starting.
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kid_rizal
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PostPosted: Fri Jul 09, 2004 9:07 am    Post subject: Reply with quote

ok thanks guys for the sign and symptoms tat i shud look out for ;

firstly, manage to do the method scykoe suggest and the bike start w/o me removing the nut below the carb...

secondly, no white smoke coming out from my exhaust after warming up or when warming out...so can rule out the piston ring trouble??

thirdly, the kick starter can be pushed by hand thru the whole kick startin process...but the compression did come back after the bike finally managed to be started and warmed up...

the top 3 things are clear now...

but now comes another puzzling thing...there is a really strong burning smell coming from the engine everytime the engine starts...whats happening there? the burning smell will last all the way when after warm up till the end of the journey...really scary so pls advise thanks again...i'm kinda new so hopefully u guys can understand all this qns...

-rizal
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FrozT
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PostPosted: Fri Jul 09, 2004 11:25 am    Post subject: Reply with quote

bro, had quite similiar problems for my supercomp last time.

1)after few days(3 days max) never start, bike seems to lost compression.
(Only the first few kicks hv compression)
2) if i manage to get the bike started and the enigne is all warmed up, the compression will be back as normal.
3)no white,black,purple,blue smoke or watever..seems ok.
4)sometimes there's a burning smell when bike is warming up. Burning smell
dissapear after riding it. Check coolent all(SC, i noe XR no coolent) everything ok.

Did nothing about these "signs" and ride as per normal until one day....
couldn't start the bike at all! check my engine oil dip.. all milky like teh susu.
tow to shop, mechanic diagnose and decide to open up the engine. piston ring koyak.. piston koyak.. block scratched.. water pump seal broken .. Sad
also according to the mech.. the valve that supplys the engine oil to the
piston and block is spoil.. can't remember what izzit exactly. dats is where
the burning smell come from.. insufficient oil to lubricate the piston and block.
i think dat burning smell dat u re smelling, mite b becoz of tis...

for me,in the end, give up on the bike... got another 4 stroker... Very Happy

neways.. just sharing my ex... hope urs doesn't hv the same fate as mine.
better get it check if the symptom occurs again.. good luck brah! Wink
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funnyloh
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PostPosted: Fri Jul 09, 2004 12:58 pm    Post subject: Reply with quote

Quote::
kick starter can be pushed by hand thru the whole kick startin process...but the compression did come back after the bike finally managed to be started and warmed up...

Trust me.

Open up and check your rings

they are gone

dun wait till white smoke maciam the fogging machine.

will be lagi expensive

plus you said "check the engine oil its extremely low"
If there are no oil leaking onto the ground, most likely they are burned.

Aniway can do a compression test from the spark plug hole.

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kid_rizal
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PostPosted: Fri Jul 09, 2004 7:39 pm    Post subject: Reply with quote

ok guys...will check it soon...i'll update when the final diagnosis is out...thanks again bros...

oh ya...any mech u guys can recommend? still new so lookin out for a gd mech to chk the bike...thanks...
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RedRider
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PostPosted: Fri Jul 09, 2004 10:19 pm    Post subject: Reply with quote

how can u chk oil level when u cant start e bike?
ur xr need some warm up b4 oil is pump up 4 a actual oil level chk..

if ur air filter is dry without foam, could be one reason when urs ia difficult 2 start..

close full choke wif ignition off n open some full throttle, n kick few times..
on ignition, n kick again, it shld start n die off..
switch 2 half choke, n start 4 warm up..
release choke aft warm up..

keep it 4 some references.. Smile
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HmCooked
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PostPosted: Fri Jul 09, 2004 11:04 pm    Post subject: Reply with quote

One thing I'll definitely do now is to warm up the XR, den kill the engine and check engine oil level. Since you top up the oil while it was cold (after 3days somemore), I'd suspect the bike's now drowning in it's own 'blood'. Sad

2ndly, it wld be to check for engine noise when the bike's at operating temperature. If there's some excessive rattling or ticking, or it dun sound smooth-running, it's time to head to the mechanic.

If the engine's pretty quiet, and no smoke from the exhaust, plus the cold start problem dun come back every other day, it's probly safe to go.
Would be good to bring it for a regular servicing tho, jus to be sure.

P.S. For that lost of compression issue, a guess wld be due to the contracting and expension of metals..
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kid_rizal
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PostPosted: Fri Jul 09, 2004 11:28 pm    Post subject: Reply with quote

HmCooked+Jul 9 2004, 11:04 PM wrote:
QUOTE (HmCooked @ Jul 9 2004, 11:04 PM) One thing I'll definitely do now is to warm up the XR, den kill the engine and check engine oil level. Since you top up the oil while it was cold (after 3days somemore), I'd suspect the bike's now drowning in it's own 'blood'. Sad

2ndly, it wld be to check for engine noise when the bike's at operating temperature. If there's some excessive rattling or ticking, or it dun sound smooth-running, it's time to head to the mechanic.

If the engine's pretty quiet, and no smoke from the exhaust, plus the cold start problem dun come back every other day, it's probly safe to go.
Would be good to bring it for a regular servicing tho, jus to be sure.

P.S. For that lost of compression issue, a guess wld be due to the contracting and expension of metals..
My mistake for topping up the engine oil while it was cold...didn't know tat its not advisable to do tat...as for the engine sound i can't really differentiate the noise level from it as i cant remember how my engine sound 3months back compared to 5minutes ago...now my bike is easy to start(kick once only) as per normal after the incident and i've not check it with the mech yet...will go tomorrow...

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