Providing you have fitted the piston seals in the lower grooves and the dust seals in the upper grooves, you should push the pistons into their bores by using both thumbs and pressing down. This way you can ensure that they go in square to the bores. The seals are best lubricated before you do this. Sometimes it will need good firm pressure to see them home!
It is important that you replace the pistons in their original bores ok?
Thanx for that but, just done the near side and the had a bad build up of oxidised ally in the dust seal seats/grooves, could be I didnt clean the off side out enough and its causing the seal not to sit right.
Im thinking of putting some copperslip in the groove to stop any future crud building up and just coat the dust seal with fluid for putting the pistons in - comments??
Also the pistons are new and appear to be the same diameter, unlike the Sprint and Tripple.
Edit - Just to add its chuffin freezin in the shed
Got mine from Triumph-online, ss pistons and seals £35 a side.
Started the bleeding process last night and bled a lot more fluid through than I drained out, eventually gave up due to being too cold.
Play has been postponed today due to an MOT failure on the wifes car.
Re visited the brakes on Thursday and theY bled through in 5 mins, all the air seemed to have collected in the off side pipe and only had to top up the reservoir twice.
Next stop MOT they`re bound to find something to fail it on
Edit - AVM, tried that route with my local Tractor dealer, not as cheap over here as the US though.
Tigs passed her MOT today but got a note to say the steering was tight, even tighter than last year, thought it might have eased off with miles but no the bearings were changed by a main dealer 7.5k ago so whats the score?
Also a mention that the rear disc was warped/out of true, the machine said so
Still, can ride for another year legally now
There's been a few posts on here about tight steering bearings, but I must admit it's something I don't mess around with.
As for the brake disc, a common problem. I had my front ones changed uynder warranty, even though I couldn't tell they were warped. I just thought I'd ask . That proves to me that Triumph know there is an issue with them.
Had the same trouble fitting the pistons back past the dust seal but found a three inch G clamp gave the leaverage to keep the pistons square to the bore and enough even pressure to fit them smoothly - hopes this helps
A forum community dedicated to Triumph Motorcycle owners and enthusiasts. Come join the discussion about performance, racing, cafe racers, bobbers, riding, modifications, troubleshooting, maintenance, and more!