Update:
I installed Dunlop Elite 3 tires: Mt90B-16 72H front and MU90B-16 78H rear on my 2001 SERG. The front tire, after installation, was slightly narrower than the 402 but not realy noticable. Also, as I found so much conflicting information on using the MU90B-16 on the rear of 2000-2003 Electro glides I figured it would help if I posted what I did to install the tire and also upgrade the left wheel spacer, see attached photos.


Original Post:
I just recieved a set of Dunlop Elite 3 tires: Mt90B-16 72H front and MU90B-16 78H rear for my 2001 SERG. The rear tite is the same width as my inflated 402 which is a MT90B-16 74H which would be expected as the MU90-16 inflated is about .3 inches wider. The front tire on the other hand is at least 1/2 inch narrower than the installed 402 Mt90B-16 72H. I just cant see inflating the front tire will widen it as much as the 402. Per the Dunlop specifcations they should be the same width after inflation. Any thoughts on this?

 

RunEm! They will be absolutely fine!

 

I replaced my stock 402's with E3's when I swapped wheels and I still have the stock front wheel and tire in the garage. I put the caliper on both and the 402 is only 0.1" wider than the E3 @ 36psi.

 

another thread on e-3 said the mu wouldnt fit 03 and earlier?said he had to go with the mt front and rear.

 

I had the tires mounted by the local dealer this weekend. The Dunlop Elite 3 tire (Mt90B-16 72H front) when installed was as mentioned above, was just slightly narrower than the 402. I have yet to install the rear MU90B-16 78H on the bike. After tire installation, laying a stright edge on the pully it was clear the belt would clear the tire but not with the gaurd in place. As I have a graveler driveway I am not in favor of removing the stone gaurd so I ordered the Pingel .2 inch thick pully spacer. I should have it so I can install the rear on Saturday.

 

I just removed the rubber flap and metal piece where the belt passes the tire on the guard, maybe an inch or so, no issues. And I don't really think it was bad enough to do that, honestly.

 

I am running the MU on my 1999 RK with no problems or rubbing for 12,000 miles.

 

The key to the E3 is running the 36psi. I had mine over inflated and they started singing to the point that I couldn't stand the ride. After figuring out the correct pressure, I haven't had any problem. Best touring tire that I've had yet.

 

I could probably trim the stone guard flap as mentioned and not effect the performance of the flap much at all as the tire is only at its widest at one point on the guard.
I tried to see where my belt had been riding on the front pully and it looks like it was towards the outside therfore adding the spacer (which is .2 inch) wide may not work. I will have the spacer in case I need it but I may try it without first.

 

I installed Dunlop Elite 3 tires: Mt90B-16 72H front and MU90B-16 78H rear for my 2001 SERG. As I found so much conflicting information on using the MU90B-16 on the rear of 2000-2003 Electro glides I figured it would help if I posted what I did to install the tire and also upgrade the left wheel spacer, see attached photos.


1. I measured the space between the rear wheel of my MT90B-16 Dunlop 402 and the belt guard. The measurement was .300 inch. Given the MU is approximately .300 inch wider (.150 inch per side) than the MT I figured the MU would fit without modification.
2. I removed the two tires and had the tires installed by my local Harley dealer which cost $120 for the two with new valve stems and balancing.
3. After installation I placed a straight edge on the inside edge of the pulley where the belt would be and the belt would clear but not by much, maybe 1/8 inch. Given this and that I wanted to maintain the belt stone guard I decided to purchase the Pingel pulley spacer (62051) for $47.00 from Dennis Kirk. The spacer is .210 inch wide per my measurement.
4. I removed my belt pulley and cleaned up the bolt threads and then chased the threads in the hub to remove the loctite residue.
5. I trial fit the spacer to the hub and the pulley. The fit was good but I noticed the OD of the spacer was smaller than the OD of my hub. This is not an issue but it should match. It is possible some hubs are smaller. I then measured my hub flange (section that fits inside of the pulley) height vs. the c-bore depth of the spacer. The hub flange was .020 inch higher than the c-bore depth which is not acceptable. I carefully filed the hub flange to remove .025 inch which took some time to do it right. The spacer then set flush to the wheel hub. Note: As the spacer is only .210 inch wide, with the c-bore and the flange on the opposite side there is only about .035 inch of aluminum holding the flange to the spacer. This is acceptable but this is why the spacer can not be less than .210 inch wide.
6. As my bike is a 2001 it has the older style swing arm with the ¾ inch diameter rear axle and 1.5 inch wide belt. It has been reported that the swing arms can break in the area of the axle slot. Part of the problem with this era swing arm in my view is the left spacer that is only 1.125 inch OD which puts allot of stress on the slotted hole as there is not much contact area. My swing arm had some wear where the spacer contacts the inside surface of the arm. To correct this I designed a stepped spacer which is stepped from 1.5 inches to 1.125 inches. The spacer spreads the force over a larger area and is the same diameter as the right caliper mount. The spacers were made from 17-4 PH annealed stainless steel. I made a new one for the right side as well but did not change the design.
7. Since I had the wheel off I installed new Lyndall Gold Plus Brake Pads which I have on the front.
8. With some help from my Son we installed the rear wheel. Everything fit with no interferences. I measured the clearance between the tire and the belt guard flap (with it against the belt) with the wheel spun forward there is .310 inch of clearance. With the wheel spun backwards there is .230 inch clearance. Note: When spinning the wheel forwards the belt tracts to the outside of the front pulley and when spinning the wheel rearwards the belt tracts to the inside of the front pulley. Based on the measurements taken the tire would have rubbed the belt guard flap backing up without using the pulley spacer which has been reported by others. Note: The rubber flap is .080 inch thick.
9. In summary, the larger rear tire fits fine with the Pingel spacer but make sure to take your time and take plenty of measurements as your bike maybe slightly different due to tolerance stack-up.