peugout speedfight 2 50cc (a/c)

jameswallace · Derestricted Danger Joined: 11 Aug 2009 Karma :

hi i have recently posted about my problem with my bike, and i have come to the conclusion that it is something in the engine.

i was wondering what the compression should be (in psi) for my bike, it is currently kicking out 65 psi.

wondering if anyone could help

and also help me with what the vacum pumps do, like there is a pipe that sucks, under neath the bike, and one that blows into the exhaust.

and also wondering if anyone could suggest any ideas

thanks in advance

TUG · World Chat Champion Joined: 12 May 2007 Karma :

I recently rebuilt one of these with a 70cc kit on.
What seems to be the problem?
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Haz ER-5, innit!

jameswallace · Derestricted Danger Joined: 11 Aug 2009 Karma :

well it idels fine, but at full revs, well it doesnt go to full revs, there is no power, at all. it stutters, i have tried a new carb, checked the reeds, changed the plug, done everything.

wondering what the hell is going on, and whether psi of 65 is normal???

and also what the vacumn pipes all do

cheers for your reply

TUG · World Chat Champion Joined: 12 May 2007 Karma :

Wont achieve full revs? could be a few things, What did your old plug look like?
As for vaccum pipes one sucks via the carb to draw petrol to the carb from your tank, the one on the exhaust it to dilute emissions and doesnt really do much if i'm thinking of the same one.
____________________
Haz ER-5, innit!

jameswallace · Derestricted Danger Joined: 11 Aug 2009 Karma :

old plug looked fine, my mate who is highly expierenced said its all fine.

i know about the fuel pump one, and the emission one, but there is a 3rd one, which sucks, enough to suck your balls down it if you werent careful!!!!

im sure your thinking of the same one, cos of the crank come 3 pipes one for the fuel, one for the ehaust and another mystery one!

well i have eliminated that its not reads carb or that area, is something internal

cheers

TUG · World Chat Champion Joined: 12 May 2007 Karma :

Did you change the settings on your carb at all? And by fine do you mean it was a nice tan brown plug? Are you not getting confused with the 2 stroke pump pipe? Post up a pic that will clear things up.

If you think its internal, then i'd be tempted to get a top end gasket kit and take the head and barrell off theres only 4 bolts on the head and the air cooled motor is stupidly simple, this will put your mind to rest and if your mate is a mechanic then i'd get him to help you.
____________________
Haz ER-5, innit!

jameswallace · Derestricted Danger Joined: 11 Aug 2009 Karma :

well ive oredered a full gasket kit, and yer hes been helping me. i would up a pic, but my bike is at his flat!!!

and the pipe has a air filer in, it is quite a large pipe. i cant find anyone or anything which knows about it. it has to be a standard thing as it has not been added

and im not getting it confused with the fuel pump pipe no, and it was slightly black, but being a 2 stroke!!!!

and nope, standard carb, aint been messed with!!!

do you recon the rings have gone or something?

cheers

ms51ves3 · Super Spammer Joined: 07 Jun 2007 Karma :

Ben, did you miss it when he said it's putting out 65psi of compression?

It needs a top end rebuild.

jameswallace · Derestricted Danger Joined: 11 Aug 2009 Karma :

is that what you reccommend?

ive re built engines before, well boat engines, but its similar stuff

what psi should i be kicking out then?

cheers

TUG · World Chat Champion Joined: 12 May 2007 Karma :

jameswallace · Derestricted Danger Joined: 11 Aug 2009 Karma :

chekcing what wrong???

and you on about fuel pump, if so, checked that, absolutly fine!

cheers

TUG · World Chat Champion Joined: 12 May 2007 Karma :

no, the 2 stroke pump, it should pump 2 stroke into the carb its a little metal thing under your floor board on the left hand side.

I dont know what PSI is should be hitting, if when you put your foot down on the kickstart and you cant feel any resistance then its a fail.
____________________
Haz ER-5, innit!

jameswallace · Derestricted Danger Joined: 11 Aug 2009 Karma :

well i can feel resistance but minimal.

was told should be getting 82 ish psi but not sure if this is accurate

oil pump is working fine, checked volatage ect, 7v pump

cheers

TUG · World Chat Champion Joined: 12 May 2007 Karma :

It might be getting the voltage but not be pumping, when you rebuild it, i mixed a bit of 2t in the petrol while i pulled the 2t pump pipe off to check the feed line was doing its job propperly, it wasnt thats what caused my seizure so we had to replace it.
____________________
Haz ER-5, innit!

jameswallace · Derestricted Danger Joined: 11 Aug 2009 Karma :

ok well cheers the advice, ill try that, well im definatly not siezed, hopefuly just down on compression, ordered a gasket set, and goign to rebuild engine

any other adivce you got

cheers

TUG · World Chat Champion Joined: 12 May 2007 Karma :

If your down on compression its more than likely your rings are seized to the piston and half melted.

I think your in good hands with your mate being a mech or in the know as you put it.

Any problems post up and make sure you 2t all the new bits when you fit them.
____________________
Haz ER-5, innit!

jameswallace · Derestricted Danger Joined: 11 Aug 2009 Karma :

yer well cheers for the help Smile

ill post if it all goes belly up !!!

yer well i will order new rings soon then

got any ideas were i could get some

cheers

TUG · World Chat Champion Joined: 12 May 2007 Karma :

Unfortunatly i cant remember where we ordered our kit from sorry.

Google is your friend on this one, also look for what psi compression it should be producing as i'm interested in this.
____________________
Haz ER-5, innit!

jameswallace · Derestricted Danger Joined: 11 Aug 2009 Karma :

On this forum? No he's not. To busy fixing engines lol

And I've searched everywhere for a psi, googled it. Ect. Maybe I'm bein blonde
Or stupid, but can't find it anywhere. Was only told by my mate who has my break down
Manual, but as that is a 96 - 05 and mine is a 06 I'm not relilying on it 100 percent if u get me

Cheers

Billing · World Chat Champion Joined: 12 Mar 2009 Karma :

I'd second knackered rings or piston, my mates sh50 would start and idle ok, but as soon as you tried to give it some throttle it would bog down, turns out there was a whole ring missing, as well as a part of the other!
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ms51ves3 · Super Spammer Joined: 07 Jun 2007 Karma :

Kick down on the kick start to feel how much compression there is. Now drop a cap full of 2 stroke oil in through the spark plug hole and do it again. If you can feel a noticeable difference between before and after you need at least new rings.

jameswallace · Derestricted Danger Joined: 11 Aug 2009 Karma :

thanks for your replys, well i replaced the piston and bore ect and it runned fine (oh also had problem with muffler...) but yer ran fine for 4000 miles, now got anot her problem Neutral

i was at ronudabout and pulled out then it died, got no power and sounds like its back firing or something like sometime in exhaust popping,.,,,, ? helo would be apriecated
thanks