Blaster project i need help

[Sand Star]

Hey everyone, i recently picked up this blaster that is in need of a top end rebuild, possibly more, i just ordered the top end rebuild kit from weisco, and decided to join this forum for some help. ive never done a top end before, and im just looking for some tips as i do it. my goal is to have this blaster running and ready to ride in the next 2 weeks I:I

 

[89blaster89]

were are you located just curious?

 

[Sand Star]

i am located in nebraska, trying to get this thing running before a riding event soon

 

[89blaster89]

what size piston did you order? did you check your bore size so you ordered the right one?

 

[Sand Star]

yeah i did, my bore size is like 66.1 so i just order std, and my bore looks pretty good too, so im not going to do anything with that

 

[Blaaster]

yeah i did, my bore size is like 66.1 so i just order std, and my bore looks pretty good too, so im not going to do anything with that

66.1 is above specs!

0.035 to 0.040 is piston to bore clearance on a stock piston.

You are going to have bore and hone it!

 

[Sand Star]

crap, looks like i will have to send it back then, what size should i order then?

 

[Awk08]

you should have that cylinder measured by whatever reputable shop in your area you choose to use, and let them tell you the extent of wear to the cylinder and recommend a piston size for you, then they should bore/hone the cylinder to match that exact piston when it gets in their hands.

chances are, without a meltdown, just .10 over should be fine, but have it measured first to be sure

btw...use only OEM yamaha or cometic base gasket, no green/blue/black paper gaskets.
leakdown test it after assembly and proper heat cycles, then retorque head and base bolts

 

[Sand Star]

what are these 2 holes for???

 

[mud runner]

thats for the oil injection system but it looks like someone deleted it

 

[Sand Star]

do i need to plug those or something?

 

[Blaaster]

To keep crap out of the case you can cover them from the inside.

Make sure that the oil injection nipple on the carby is capped.

 

[Sand Star]

what do you run for oil and mix? i usually run 32 to 1 klotz super techniplate. and also how do i remove my tors off my carb and what is the advantedges of doing so?

 

[Herpderplol]

Most people run 32:1 for fuel, and klotz is good I:I

How to remove TORs:

Pre-03
http://www.blasterforum.com/do-yourself-20/how-remove-your-tors-655/

03+
http://www.blasterforum.com/do-yourself-20/03-06-tors-removal-diy-41973/



What you need to buy:
Blaster Tors Eliminator Kit w Idle Screw Kit 88 2006 | eBay

How to install it:
http://www.blasterforum.com/do-yourself-20/aftermarket-carburetor-cap-idle-screw-install-22174/

I:II:I

 

[Sand Star]

what do i need to do to break the fresh top end in?

 

[Awk08]

you'll get varying answers to this
here's what works for me........

3-5 complete warmups while lightly revving it,
complete cool downs in between each.

retorque head and base bolts

no sustained wide open throttle runs for a tank or 2 of fuel.

 

[Blaaster]

/\ /\ /\ /\ That is how it is done, no more than 3/4 throttle for 2 tanks full.

 

[Sand Star]

what kind of oil do i need to run in the gearcase? and how much

 

[Blaaster]

650ml of 10w30 plain old engine oil with no friction modifiers, Automatic trans fluid type F, or an off the shelf motorcycle gear oil designed for wet clutches.

Here look it up for yourself.

http://www.blasterforum.com/general-support-17/downloadable-yamaha-blaster-manual-17325/

03+ supplement:
http://www.blasterforum.com/do-yourself-20/03-06-blaster-repair-manual-supplement-1916/