For the record, I've had one of the adapters separate while the bike was on the lift. Not catastrophic but it could have been if I wasn't paying attention.

 

It don't much matter how tall they are (to an extent, I guess) the point is to jack the bike up into the air... The 2x4s maybe slightly taller, but that just means you have to kick your jack just that little bit less...LOL. Can't beat the price, and satisfaction of avoiding the stealer!

 

HD lift blocks work fine, just as long as you make sure that they are completely vertical, otherwise the weight will make them separate.

On another note, if your buying a jack, if I had known about JS before I bought the sears, I would have spent the extra.

 

I thought the HD adapters were designed to lift three frame contact points just high enough to align with the fourth contact point? If that is true then the wood blocks wood need to be the proper height.

Am I missing something? Does the HD adapter kit comes with three blocks?

 

It comes with 3 blocks and 1 C channel adapter that fits the one odd-ball corner that extends below the oil pan. So, four pieces in total.

 

Ok, so the three blocks will ensure that all four frame contact points sit evenly on the jack. If you use three 2x4s then won't the three frame contact points on the wood be higher than the frame point by the oil pan?

 

Let me go and grab the hd adapters. I'll measure them quick and see what they are then I can answer your question.

 

Ok....

3 frame adapters give ~ 1 11/16" clearance (2x4 = 1.5" (1 8/16"))

1 oil pan adapter = 3/16" clearance


The exact difference is 3/16"..so using 2x4's would keep it exactly level also.

 

Thanks.

 

Thank you actually. Forced me to have it make sense in my head to. Now it does. Anyone want a brand new set of adapters? LOL