Base gaskets...is it time?
Tourer
Joined: Mar 2014
Posts: 351
Likes: 0
From: Colorado
Evo's in stock form are a slug, need some compression to get ahead of the blue hair in a Buick. EV27"s work by a earlier intake timing that creates more cylinder pressure. Yes that will make most Evo owners happy but a known secret to a Evo is compression and 9.5-1 isn't going to create reliability factors plus compression can add efficiency plus EV27 early intake timing finishes it of.
There is no reason why a 75 hp Evo equipped with a CV cannot get 45-48 mpg, turning screws and guessing at jets is just a guess in tuning so struggling an efficient engine cannot produce.
It always comes down to what the owner wants, If the owner is satisfied with a flat sounding Evo exhaust sound then that is what matters it is his bike and the motto of the Evo section and money plays a part in engines, will snowball until completed so if cleaning up 8.5-1 pistons for a budget reuse is what many applaud plus working on a bike in your garage is about, if wanting a little giddy up by efficiency then compression will work and not a hidden secret.
Yes those base gaskets become harder than a wedding d$!k and can destroy a set of cylinders trying to get then off, alot of neat tricks in these forums on a home method of truing bases up for reuse
There is no reason why a 75 hp Evo equipped with a CV cannot get 45-48 mpg, turning screws and guessing at jets is just a guess in tuning so struggling an efficient engine cannot produce.
It always comes down to what the owner wants, If the owner is satisfied with a flat sounding Evo exhaust sound then that is what matters it is his bike and the motto of the Evo section and money plays a part in engines, will snowball until completed so if cleaning up 8.5-1 pistons for a budget reuse is what many applaud plus working on a bike in your garage is about, if wanting a little giddy up by efficiency then compression will work and not a hidden secret.
Yes those base gaskets become harder than a wedding d$!k and can destroy a set of cylinders trying to get then off, alot of neat tricks in these forums on a home method of truing bases up for reuse
Road Master
Joined: Jan 2012
Posts: 856
Likes: 9
From: North Carolina
Just a note on scraping gaskets, use a real gasket scraping tool. Even though people say use a razor blade I think that's a horrible idea. I still have MAC gasket scrapers from my Piedmont Aviation days. Make it sharp and be patient. With the tool you can go all the way to the metal without damaging the soft aluminum. I have tried chemicals. Don't waste your money. They don't do anything, at all.
If you just noticed the weepage you have some time to ride on it, I think. I rode a 91 Heritage for about six months with a weep. It slowly got worse, I got tired of looking at it and I finally pulled it apart and fixed it. It was a surprisingly simple repair, just takes a few hours. The only special tool needed was a torque wrench.
If you just noticed the weepage you have some time to ride on it, I think. I rode a 91 Heritage for about six months with a weep. It slowly got worse, I got tired of looking at it and I finally pulled it apart and fixed it. It was a surprisingly simple repair, just takes a few hours. The only special tool needed was a torque wrench.
Tourer
Joined: Mar 2014
Posts: 351
Likes: 0
From: Colorado
Just a note on scraping gaskets, use a real gasket scraping tool. Even though people say use a razor blade I think that's a horrible idea. I still have MAC gasket scrapers from my Piedmont Aviation days. Make it sharp and be patient. With the tool you can go all the way to the metal without damaging the soft aluminum. I have tried chemicals. Don't waste your money. They don't do anything, at all.
If you just noticed the weepage you have some time to ride on it, I think. I rode a 91 Heritage for about six months with a weep. It slowly got worse, I got tired of looking at it and I finally pulled it apart and fixed it. It was a surprisingly simple repair, just takes a few hours. The only special tool needed was a torque wrench.
If you just noticed the weepage you have some time to ride on it, I think. I rode a 91 Heritage for about six months with a weep. It slowly got worse, I got tired of looking at it and I finally pulled it apart and fixed it. It was a surprisingly simple repair, just takes a few hours. The only special tool needed was a torque wrench.
Cruiser
Joined: Feb 2015
Posts: 154
Likes: 0
From: ny
I just did mine. It wasn't that difficult at all. Like stated before the worst part is removing the old gaskets. I actually figured out using a fine wire wheel took it off but it was still a significant amount of work
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