Jawa 350 / 632 engine rebuild (fitting the crankshaft)

[iroq22]

What do you use to freez the crankshaft ? i'm waiting to replay

[terence20001]

@iroq22

Hi , The only method i have is to use my domestic freezer while my wife's not looking :-)

But first i wrap the crank in plastic bag to try and seal it in whilst in freezer .

I've used this method for quite a few years with different Jawa's 634 / 638 e.t.c. and find that assembly is very easy this way .

All the best Terry

[miro263]

great work!

[terence20001]

@miro263

Hi Thank's

Appriciate your comment on the build .

All the best

Terry

[pitbull1952]

nice video terrence, its the first time ive seen this done on a jawa, the guide for the dowel pin is a good idea, good luck with it m8. regards dennis

[terence20001]

Hi Dennis

Thank's glad you like the vid , in the past when i've fitted these cranks i've missed the dowl recess by a couple of mm , but once its in its in l.o.l. So i thought i'de make some sort of guide , and im pleased to say it worked great so hopfully they will all go in this well :from now on :-) Apart from top end the rest should be done in next couple of days ,

Hop all is well with you . All the best Terry

[Radminster]

Hi

that 632 ore actually 634 engine is with super better sound then 638 engine, I just put 638 engine in my jawa 634 only because the 12v system.

here is the picture before - img687.imageshack.us/img687/62­30/img7470i.jpg

after - img819.imageshack.us/img819/30­46/img7522x.jpg

[terence20001]

@Radminster Hi Yes it is basicly a 634 but with 12 volt alternater and 638 engine mounts .

Like you say the iron cylinder does sound nice , i carnt wait to get it finnished .

i used to have a 634 oilmaster and the 638 i had was'nt the same some how :-)

I'll have a look at your photo's

All the best Terry

[ivaa7777JAWA]

@Terence 20001 great work Terry ! Thank you !!!

[terence20001]

@ivaa7777JAWA Hi

Thank you for your positive comment , im pleased you like the vid .

Cheer's  Terry

[zip343]

Hi Terry...I've watched the vid twice...very informative...enjoyed the presentation...all I can say is...You are the Best...Zip...

[terence20001]

@zip343 Hey Don  Cheer's

Appriciate your comment on this vid as i found it quite awkward to film and do the job at the same tims so well pleased with that .

All the best Terry

[RastaLomengo]

Good work! I wish you a good 2012

[terence20001]

@RastaLomengo Hi Thank's appriciate it .

All the best for 2012

Cheer's  Terry

[jawaczman]

Happy new year mate another top vid looking forward to part two

[terence20001]

@jawaczman Hi Ray

Thank's hope you have a great 2012 aswell.

Appriciate your comments Cheer's

All the best Terry

[Alesblaha2]

Very good job, Terry! I like all your videos! It is great! But I think that you have the engine JAWA 638 in your JAWA twin 350! CZ is also very nice!!! :-) Have a good time, Aleš :-)

[terence20001]

@Alesblaha2 Hi Thank's im pleased you like the videos :-)

yes you are right my jawa is 638 :-)

soon i will have to re register it as 632 once i change the engine .

All the best Terry

[Bevoin1970]

Excellent Terry, as always, very informative, backed up with good camera shots and narration.

I liked the bit at the end, when you admire what you've done so far, but also hoping you haven't forgotten to install anything from inside the engine...LOL

My mate did it with a Honda CG125 engine many years ago. there he was telling me what a great job he'd done after a complete strip down and rebuild, only to find the timing belt tensioner still on the bench as he glanced down drinking his cup of tea.

[terence20001]

@Bevoin1970 Hi Paul

When i first read your comment it made me think "have i left anything " hahaha

Thank for your positive comment on the vid footage ,well appriciate the feed back .

All the best Paul Terry

[m2mark1]

Nice one Terry, making it all look easy and unflustered as usual.

[terence20001]

@m2mark1 Hi Mark

Underneath the calm i was sweating l.o.l.

But all is going well .

Cheers Terry

[n0named]

638 has indeed a bit more power, but the torque in lower RPM speaks for 634 engine. (and the iron cylinders have better sound :) The main disadvantage might be the cooling... And I recommend having this instead of the stock ring w w w.motocentrum-vitkovice.cz/i/I­mage/DSC07374.JPG The area of where the ring and engine block touch is then much larger. (some engines with high mileage tend to have enormous play in this place and it is basically unrepairable)

[terence20001]

@n0named Hi Yes i agree the 634 has better torque low rpm .

I just love the riding carecter of the 634 aswell :-)

This is main reason im fitting the 632 engine to get some of the old carecter i miss from my 634 .

I like the replacment centre bearing carrier ( labrinth seal ) If i have wear problems in future builds i'll have to try this type out it looks good with more sealing edge .

All the best Terry

[dejongwiebe]

Cheers for that!

[terence20001]

@dejongwiebe Hi Thank's

Glad you like the first part . Cheers Terry

[hacky2008]

nice one terry..always learning something new from ya bud...bostin..:)

[terence20001]

@hacky2008 Cheer's

Pleased you got somthing from the vid ,

Next two follow up vids i'll try to put more detail in aswell if i can :-) .

All the best Terry