Quote:
| Originally Posted by polarexpress Why do you buy DOT 4? Why not Shell Advance Brake Fluid DOT 5.1? Sounds all right... if you're riding a diesel Duc  |
Dot 4 is glycol based fluid, absorbs water. dot 5 is silicon based and does not absorb water...so any water / moisture found in the dot 4 system is usually absorbed into the fluid. With dot 5 it does not absorb water, therefore any in the system accumulates at the lowest point, ie your calipers and causes corrosion there!!
You can buy a seal kit prob from ducati, or the master cyl manufacturer...usually a few quid.
Hope that helps