ASP FS70 FRONT BEARING

[CARPERFECT]

Looking to replace the front bearing on my fs 70. is the bearing a sealed bearing ?

[Martin Harris - Moderator]

I normally go with whatever is fitted by the manufacturer. Quite often, the front bearing is only sealed on the outside but it's just a case of prising the seal from one side with a sharp pointed implement - same goes for metal shielded bearings.

In my experience, the front bearing is usually OK when a rear bearing is on the way out but I change them anyway as they are inexpensive (when bought from a bearing specialist anyway). I would recommend changing the main bearing while you're at it.

Simply Bearings are my supplier of choice - great prices and reliable next day free delivery. I use C3 clearance bearings which I understand are the best option for engines.

Edited By Martin Harris on 23/09/2019 21:06:49

[Denis Watkins]

Most of our front bearings are sealed, as oily fuel would pass through the front bearing

And rear bearings with no seals that they run in oil

But many

Practice removing the inner seal on the front bearing that the races are lubricated from inside

[CARPERFECT]

If the front bearing is sealed (factory) then then bearing must be pre filled with grease ? as no bypass oil can get to it. I replaced to bearing last year but only with a shied one. i removed the iner shield. but it leaks oil like hell. so sealed it is then.

[Denis Watkins]

The few front bearings that I have replaced are left sealed

As you propose to do

Edited By Denis Watkins on 24/09/2019 09:07:56

[Cuban8]

Have put life back into many ASP & OS fourstrokes by replacing bearings - fit and forget a sealed front bearing, you won't have any issues.

[Engine Doctor]

Posted by CARPERFECT on 23/09/2019 20:44:06:

Looking to replace the front bearing on my fs 70. is the bearing a sealed bearing ?

 

While your at it replace the rear bearing as well. Even tiny amounts of wear will change the valve timing enough to cause a drop in power. Rear bearing wear can be detected by holding prop atop and bottom an rocking back to front it,any play will be felt. Is it  a sealed or sheilded bearing ? Sheilded have a metal cover to prevent dirt from entering bearing while sealed have a rubber coated plate that is a actual seal on the rotating center of the bearing. Only the outer shield or seal is needed . Wash out grease and lubricate with appropriate oil before fitting.

Just replace like for like.

+1 for Simply Bearings.

Edited By Engine Doctor on 24/09/2019 09:56:59

[CARPERFECT]

All done, only an hour and half job, + the 20 mins it was in the oven. New front sealed bearing Only £3 and the man says Did i want a good one or one of chinky cheap ones. lol. So got the good one. The Company is called Spen Bearings, and is based in Cleckheaton in West Yorkshire. I tried Huddersfield Bearings first. But they want a minimum order of £12 . Just engines wanted £11.10 plus postage