SuzukiSavage.com - Print Page

SuzukiSavage.com
/cgi-bin/YaBB.pl
General Category >> Rubber Side Down! >> Compression Test
/cgi-bin/YaBB.pl?num=1521969318

Message started by DragBikeMike on 03/25/18 at 02:15:18

Title: Compression Test
Post by DragBikeMike on 03/25/18 at 02:15:18

The LS650 has a solenoid operated compression release for starting. How do you check cranking pressure? Will it hurt the starter or starter drive if I disconnect the compression release temporarily to check cranking pressure? Will it even crank over with the compression release inoperative?

Title: Re: Compression Test
Post by Dave on 03/25/18 at 04:02:58

Disconnect the cable, or remove the arm from the shaft....or unplug the solenoid.

Easy Peasy! ;)

Title: Re: Compression Test
Post by DragBikeMike on 03/25/18 at 12:46:55

Sounds good. So I can assume that it won't hurt the starter or starter drive. Many years ago I worked in a Harley shop (early 70's). We had lots of trouble with the little sprint 350. It used a Hitachi starter with a planetary gear drive. Used to regularly see those gear drives disintegrate. I don't want to hurt the little starter on my LS650. Thanks much.

Title: Re: Compression Test
Post by Dave on 03/25/18 at 18:12:57

The case can be broken on the early models......if the engine kicks backward at the shutdown. Later on a torque limiter was installed that allowed slippage if a kick back occurred.

Every now and then when I shut my bike off.....I can hear it kick backward and there is a faint whine sound as the engine comes to a stop.

Title: Re: Compression Test
Post by eau de sauvage on 03/25/18 at 20:25:24

Please post the compression test when you have it. I did mine recently and it was only 125 which I cannot believe. Mind you it's difficult to get the adapter into the spark plug socket on this bike so I'm hoping it wasn't sealing properly.

46404F33313632020 wrote:

We had lots of trouble with the little sprint 350.

That's the aermachhi single yeah? I had a '73 model with the red white and blue stripes on a black tank.

Title: Re: Compression Test
Post by DragBikeMike on 03/26/18 at 11:01:27

Yes, the Americhi single. I have fond memories of bump starting the demo every morning to warm it up so the salesmen could get it started when a customer wanted a check out. Whew! I was not fond of the sprint 350.

Title: Re: Compression Test
Post by justin_o_guy2 on 03/26/18 at 12:40:06

If you put it in gear and roll it past tdc, then the starter can get a running start.

Title: Re: Compression Test
Post by eau de sauvage on 03/26/18 at 16:40:09

It was my first bike and it did lasting psychological damage to me that lingers till this very day. It reduced me to tears on many occasions.

45434C30323531010 wrote: