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kz750 front end swap
- Schmeck
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15 Feb 2014 20:48 #622417
by Schmeck
1979 kz750 twin -Soon to be roadworthy
1988 El250 engine in custom hard tail frame - collecting dust
Replied by Schmeck on topic kz750 front end swap
Found it . Measurements for stock front bearing is 6203-2RS = 17 ID 40 OD 12 thickness
Now I just need to switch some numbers around for the right bearing.
Now I just need to switch some numbers around for the right bearing.
1979 kz750 twin -Soon to be roadworthy
1988 El250 engine in custom hard tail frame - collecting dust
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- Schmeck
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15 Feb 2014 21:08 #622419
by Schmeck
1979 kz750 twin -Soon to be roadworthy
1988 El250 engine in custom hard tail frame - collecting dust
Replied by Schmeck on topic kz750 front end swap
At last. found what I need. 6203-RS3/4
Never would have thought to add the 3/4 to the end . :whistle:
Never would have thought to add the 3/4 to the end . :whistle:
1979 kz750 twin -Soon to be roadworthy
1988 El250 engine in custom hard tail frame - collecting dust
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15 Feb 2014 21:45 #622421
by Schmeck
1979 kz750 twin -Soon to be roadworthy
1988 El250 engine in custom hard tail frame - collecting dust
Replied by Schmeck on topic kz750 front end swap
Okay this confuses me and I need some input. Here is the link to the bearing I will most likely get. I ran the load capacities static and dynamic to pounds and the bearing should work.
It is sealed though?? My bearings that I removed were not sealed in the bearing but actually a separate seal. Do I buy this bearing and then just get the seals separate?
It is sealed though?? My bearings that I removed were not sealed in the bearing but actually a separate seal. Do I buy this bearing and then just get the seals separate?
1979 kz750 twin -Soon to be roadworthy
1988 El250 engine in custom hard tail frame - collecting dust
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15 Feb 2014 21:46 #622422
by Schmeck
1979 kz750 twin -Soon to be roadworthy
1988 El250 engine in custom hard tail frame - collecting dust
Replied by Schmeck on topic kz750 front end swap
1979 kz750 twin -Soon to be roadworthy
1988 El250 engine in custom hard tail frame - collecting dust
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17 Feb 2014 14:47 #622576
by steell
KD9JUR
Replied by steell on topic kz750 front end swap
The RS means it's a sealed bearing. You can pop the seals out and use external seals, leave the seals in and use external seals, or leave the seals in and skip the external seals.
KD9JUR
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17 Feb 2014 17:15 #622593
by Schmeck
1979 kz750 twin -Soon to be roadworthy
1988 El250 engine in custom hard tail frame - collecting dust
Replied by Schmeck on topic kz750 front end swap
Okay here's an update . I emailed DNA about getting a bigger stem and I don't think it's going to work because the bottom lip on the stem is like 31mm and 30mm is the stock kz750 stem . Too close I think . Also the only bearing races that allballsracing carries that could work are slightly too much width.
The closest on top is a 48x13 which is 1mm more than stock and bottom is 52x16.5 which is .5 more than stock .
Here is what makes me curious and I can post a picture if you want . The bottom bearing race sits further into the fork shaft . The bearing on the springer is flush on the bottom tree there about . The springer tree is going to hit the fork shaft before the bearing seats the race .
Would trimming the bottom of the fork shaft outside closer to the race fix this or is there another solution?
The closest on top is a 48x13 which is 1mm more than stock and bottom is 52x16.5 which is .5 more than stock .
Here is what makes me curious and I can post a picture if you want . The bottom bearing race sits further into the fork shaft . The bearing on the springer is flush on the bottom tree there about . The springer tree is going to hit the fork shaft before the bearing seats the race .
Would trimming the bottom of the fork shaft outside closer to the race fix this or is there another solution?
1979 kz750 twin -Soon to be roadworthy
1988 El250 engine in custom hard tail frame - collecting dust
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17 Feb 2014 17:23 #622594
by Schmeck
1979 kz750 twin -Soon to be roadworthy
1988 El250 engine in custom hard tail frame - collecting dust
Replied by Schmeck on topic kz750 front end swap
Nevermind the bottom race. I'm sure it will fit okay lol I think I will probably just have to buy a stock kit and just toss the 30mm Id bearings since I have bearings to fit the springer.
1979 kz750 twin -Soon to be roadworthy
1988 El250 engine in custom hard tail frame - collecting dust
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