Hi, great videos mate! Thanks a lot! I have question, what thickness of cylinder base gasket you use? I got three thickness, so i was wondering what should i use? Maybe the thinnest one? Thanks!
Hi ! I use the thinnest one (0,3mm) to get closer to the recommended squish of 1,5mm. In fact with the 0,3mm gasket I have a squish of 1,7mm. If I put the 0,5mm gasket I would have a squish of 1,9mm, etc... More you reduce gasket thickness more you increase torque.
Romain Quiban Thanks man.. Yes, as I think so.. I put thinnest one, so i'll see what's going to happen.. I'm not going to measure compression space, but i'll see when startup engine how it's going to sound, power output, etc.. Thanks for info anyway.. Great work and videos. You done job well, like a pro. :) Keep great work. And.. what camera did you use for filming?
I see from your video that you appear to be building the engine up indoors…what type of inducement do you use to stop the wife kicking off and ultimately being in a bad mood for the rest of the week?
can any 1 help me pls iv got 1994 sem aprillia rs rotax 123 (ingnition icu coil is broken) 4 wires red/green/black/and 2 into 1 red,white strip i changed coils but which wires go were? on High Performance Racing HT icu Ignition Coil thxxx
Scott Mc The four cylinder nuts are very hard to remove because of the frame, you will need a shorten spanner. And that's just the beginning, after there are snap rings to remove and put back without loose it, etc ... In my opinion it's better to remove the engine from the frame. You'll work much more serene.
Great Video. Best I've found on youtube for showing a rebuild. Quick question though, what are you using in the syringe? Is it just some lubrication to allow better movement or is it some special stuff? Thanks.
so many options of pistons on the market, especially @pjme. How do you know which one is best for your application? planning to go 34mm carb w/supporting mods...
If cylinder and piston is in good condition, its only waste of money to change them to new ones. 2 stroke piston can take many many hours more than you expect. If you know even little about 2 stroke engines you can have great and long driving times with them :D
Depends where you're at (Currencies are obviously different) but PJME stock piston kits for around 120GBP (Piston, Rings, Gudgeon Pin, Little end roller bearing), a little more coin if you're after OEM stuff
The cylinder head o-ring is missing in this video yes. I put the sequence that I also use in the video of squish measuring, where the o-ring is not needed. No worry, the o-ring has been settled for the real reaasembly :)
i enjoy watching your vids very much
Hi, howmuch should the piston ring end gap be? The manual states 0.05 - 0.2mm but that seems a bit less to me.
Hi, great videos mate! Thanks a lot! I have question, what thickness of cylinder base gasket you use? I got three thickness, so i was wondering what should i use? Maybe the thinnest one?
Thanks!
Hi !
I use the thinnest one (0,3mm) to get closer to the recommended squish of 1,5mm. In fact with the 0,3mm gasket I have a squish of 1,7mm. If I put the 0,5mm gasket I would have a squish of 1,9mm, etc...
More you reduce gasket thickness more you increase torque.
Romain Quiban
Thanks man..
Yes, as I think so.. I put thinnest one, so i'll see what's going to happen.. I'm not going to measure compression space, but i'll see when startup engine how it's going to sound, power output, etc..
Thanks for info anyway..
Great work and videos. You done job well, like a pro. :)
Keep great work.
And.. what camera did you use for filming?
ShakalJC Thanks ! I use a Gopro silver Hero3+
Good luck for reassembly
Is it possible to wire a rev counter to this engine
i love this Rotax 123 motor!
it's the rotax 122..
5:42
but you have not used the torque wrench
Can you change the piston without dropping and unplugging the whole engine?
Never mind I saw the answer down below on another comment.
Wow. You are so good. TY :)
I always smear oil on the rings, barrel small end etc...
No one?
will bed in rings better assembling dry
😦👍 ¡Excelente vídeo!
I see from your video that you appear to be building the engine up indoors…what type of inducement do you use to stop the wife kicking off and ultimately being in a bad mood for the rest of the week?
I was all by myself in my student room, problem solved ;)
can any 1 help me pls iv got 1994 sem aprillia rs rotax 123 (ingnition icu coil is broken) 4 wires
red/green/black/and 2 into 1 red,white strip i changed coils but which wires
go were? on High Performance Racing HT icu Ignition Coil thxxx
Question. Did you use any gasket between block and the head. or is it just o-rings ?.
Scott Mc it's just an o-ring between cylinder and the cylinder head
Can I do this rebuild with engine in frame ?
Scott Mc The four cylinder nuts are very hard to remove because of the frame, you will need a shorten spanner.
And that's just the beginning, after there are snap rings to remove and put back without loose it, etc ...
In my opinion it's better to remove the engine from the frame. You'll work much more serene.
Great Video. Best I've found on youtube for showing a rebuild. Quick question though, what are you using in the syringe? Is it just some lubrication to allow better movement or is it some special stuff? Thanks.
Hey thanks!
Yeah it's just oil engine (motul 710 here)
Romain Quiban okay thanks!
New rings on an older piston?
I think i kept the same rings
Oh 👍
Do you know what a good squish measurement is. Also a good compression limit on a piston?
nice vid
What kind of piston do U use? I think the manufacture name.:)
Vertex :)
so many options of pistons on the market, especially @pjme. How do you know which one is best for your application? planning to go 34mm carb w/supporting mods...
this music sounds like emancipator.
I love ur videos and i watched all of them but, you rebuild all your engine and use the old piston?
Thanks man, yeah the piston and the cylinder were still good
If cylinder and piston is in good condition, its only waste of money to change them to new ones. 2 stroke piston can take many many hours more than you expect. If you know even little about 2 stroke engines you can have great and long driving times with them :D
mi risulta che non abbia messo la guarnizione tra cilindro e testata.
how much roughly will cost to rebuild top end of the engine? Aprilia RS 125
Depends where you're at (Currencies are obviously different) but PJME stock piston kits for around 120GBP (Piston, Rings, Gudgeon Pin, Little end roller bearing), a little more coin if you're after OEM stuff
+TOOBZ FPV 120£ ain't bad at all, I thought it's around 200+. Thanks bro
year ?
Did the engine run after ur rebuild? :D
works like a charm :)
I dont think so. You forget about 1 gasket (oring)
The cylinder head o-ring is missing in this video yes. I put the sequence that I also use in the video of squish measuring, where the o-ring is not needed.
No worry, the o-ring has been settled for the real reaasembly :)
Good. I like yours movies. Help alot.
I got lot of questions to ask...can we email or watsapp?