Ignition Sensor Assembly
They are cheap enough themselves and I just replace them every time the cam is pulled, since only take a few mins with the correct tools.
Also, since you are that deep into the works, and will bank that have A lifters in play (HD calls out for them to be replaced every 20K), would just pick up a set of standard Johnson 2303's and drop them in at the same time. If not, then will have to get into the works again to replace A 's in another 6K. With the B lifters, good for around 35K, as well as the Johnson as well.
Just remember to point all the side oil passages on the lifters in the blocks, to aim at the jugs (direction of oil flow to the lifter sides in the blocks).
If money is tight and just want to run A's lifters until they go south, at least pull them apart to clean up the piston oil valve seats, do a flip on the plates to get the clean sides back against the sealing seats, and may be able to get 30K out of them before having problems with the roller bearings.
https://www.hdforums.com/forum/evo/1...t-of-them.html
Note, check the lifters, since may have B in the bike from the factory. On my 97, it came with A's from the start instead.
As for pulling B's apart to check the piston oil seals to clean them up as well, up to you, but if have time on our hand, not a bad ideal, since get to pull then apart to clean out any debris and sludge that they may have from time and the motor break in to begin with at least.
Last edited by Dano523; Feb 2, 2024 at 04:29 PM.
Thanks
A's on the right, B's on the left?

I ask, since by 98, HD should have been installing B lifters on the motors since they did get updated about then, but seems that where still using up the A's up to 98 for the last of the evo factory built motors/where reserving the evo B's for the shops to install them as replacement lifters at the suggested 20K mark isntead.
Just asking, Found this 1 on eBay
Dynatek 2000i Programmable Ignition Harley-Davidson 1970-1999 w/ Carb D2Ki-1P | eBay
Last edited by RANGER73; Feb 3, 2024 at 06:28 AM.
A's on the right, B's on the left?

I ask, since by 98, HD should have been installing B lifters on the motors since they did get updated about then, but seems that where still using up the A's up to 98 for the last of the evo factory built motors/where reserving the evo B's for the shops to install them as replacement lifters at the suggested 20K mark isntead.
This is what was in it.
Just asking, Found this 1 on eBay
Dynatek 2000i Programmable Ignition Harley-Davidson 1970-1999 w/ Carb D2Ki-1P | eBay
Last edited by Dano523; Feb 4, 2024 at 04:46 AM.
Figured is would be A's, while one of the other lads here stated that HD was using the B's on the factory built motors around the 96 and later time frame instead
The Best of Harley-Davidson for Lifelong Riders
Yes on the A;s, since it was a problem with how rough HD left the piston sealing surface, that marred the hell out of the sealing valve plate, would cause problems with the lifters not staying pumped up, and this would cause the needle bearing to start to get hammered. So HD advice was to replace the A's about the 20-25K mark like clock work, before the lack of pump up would case damage to not only the roller bearings, but the hardned surface finish on the cams.
Here is an A lifter that was having problems staying pumped up, due to the rough surface on the piston seal surface (caught before the lifter did start pounding to take out needle bearing and cam lob surfaces).
Look left of the piston, to see the smaller valve sealing plate and the marring on it where it seats against the piston seal.

While quick clean up on the piston surface, and flipping the sealing plates to clean side against piston seal surface, had them right as rain for back ups if needed in a pinch.

On the B's, cleaner (debured) piston sealing surface, better needle bearing/better over all design, has them lasting to around the 35K mark where HD suggest they be replaced each time instead.
And as stated, have yet to see an Evo factory built motor that got the B's from the start, and was more of just using the B's when it was time to replace the A's at the 20K mark isntead. So long as the dealer had B's, and was not trying to burn up their old stock of A's instead. I bring this up,since even if factory installed A where replace around the 2000 mark by the dealer, could still be A's.
Here is the discussion on the time frame of the A verse the B lifters, but just seems that although HD may have had B lifters before 1998 *when the microfish was changed to B's so they could be ordered that way, HD was still using the A lifters in the last of the evo factory built motors up to 1998.
https://www.hdforums.com/forum/evo/1...-1995-a-2.html
As for the oem B lifters, they are a great lifter that lasts for 35K, but so are the Johnsons, which are not priced like gold isntead.
Plus, you can get the Johnson 2303 in standard, standard with limiting spacers, slow leak downs, and slow leak down limiting spacers versions, and just depends on which cam in play.
https://larrysmcymachineinc.square.site/











