I succeeded in shifting the air cleaner back to its original position, substituting LCE for JAM adapters. The JAM parts shift the filter ~1/2" rearward, creating interference with the rear hold-down and underhood light lens.
As I wrote in post #19, the LCE adapters are designed for a filter with a smaller hole diameter (e.g., a K&N, not a stock e3/e9) and the "bridge" over the chokes is too high. Solving these problems wasn't too hard:
- I replaced the stock O rings with smaller id but thicker ones to yield the original od. I used McMaster-Carr p/n 9452K416 which are 1/4" thick. Here's a photo of the stock and the thicker O rings:
- If you have access to a milling machine you could remove ~1/4" from the base of the "bridges" to reduce their height enough to fit under the cross braces of the air filter. Since I didn't have a mill - and didn't want to just hacksaw them down - I made substitutes out of spacers and steel bar stock, using McMaster-Carr p/n 92510A768, 7/8" H x 1/4" hole dia. standoffs and a cross piece made from 3/4" w bar stock. Here's a shot of that:
And that's about it. If anyone wants more detail, contact me. So K&N filter mounts can be adapted to e3/e9's to produce a better fit than JAM adapters. It would be interesting to try the Redline 99010-457 adapter mentioned in post #11. I suspect those would also need thicker O rings, but it might be easier to reduce their bridge height.