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Re: Should I strip the top end after a heat seizure?
Posted: Tue Aug 14, 2012 8:59 pm
by Muttlyoo7
No obvious leaks found, top end stripped, piston checked and cleaned up and barrel lightly honed. All rebuilt and upjetted from 100 to 103 main and from a 55 to 58 pilot and it seems to be running fine. Now does it need a full run in or would a couple of hundred miles suffice?
Re: Should I strip the top end after a heat seizure?
Posted: Wed Aug 15, 2012 1:56 pm
by nelson pk
What carb are you running?
Re: Should I strip the top end after a heat seizure?
Posted: Wed Aug 15, 2012 2:01 pm
by RICSPEED
back off a little at first but no need to run in unless new rings /piston etc
Re: Should I strip the top end after a heat seizure?
Posted: Thu Aug 16, 2012 5:50 pm
by Muttlyoo7
nelson pk wrote:What carb are you running?
26 mil PHBH.
Re: Should I strip the top end after a heat seizure?
Posted: Thu Aug 16, 2012 10:56 pm
by paulmgreen
Might be worth raising the needle a notch too..... Take it easy 100 miles or so.... What was the plug colour like when it initially seized????
Re: Should I strip the top end after a heat seizure?
Posted: Fri Aug 17, 2012 7:26 am
by CANbus
Just wondering if you re- torqued the head during the run in process?
Which brings me to a question is there a unwritten rule, how often should you check the torque settings on the top end?
Re: Should I strip the top end after a heat seizure?
Posted: Fri Aug 17, 2012 8:47 am
by lozmondo
where was it dynoed ?
Re: Should I strip the top end after a heat seizure?
Posted: Fri Aug 17, 2012 9:03 am
by GP Kevo
CANbus wrote:Just wondering if you re- torqued the head during the run in process?
Which brings me to a question is there a unwritten rule, how often should you check the torque settings on the top end?
I think once after the first 100 miles or so, providing nothing leaked up to then. I haven't had to re-torque after 100 miles unless I forgot to re-torque in the first place.
Re: Should I strip the top end after a heat seizure?
Posted: Fri Aug 17, 2012 3:28 pm
by Muttlyoo7
The head was torqued down correctly when initially assembled. and there was no indication of any leaks from the head. I don't hold anyone responsible but myself, after all it's a tuned 42 year old scooter and I'd been riding it two up flat out!
To see details of the dyno see below
http://scooterotica.org/forum/viewtopic ... 2&start=60
Re: Should I strip the top end after a heat seizure?
Posted: Fri Aug 17, 2012 5:59 pm
by nelson pk
GP Kevo wrote:CANbus wrote:Just wondering if you re- torqued the head during the run in process?
Which brings me to a question is there a unwritten rule, how often should you check the torque settings on the top end?
I think once after the first 100 miles or so, providing nothing leaked up to then. I haven't had to re-torque after 100 miles unless I forgot to re-torque in the first place.
Agreed. If it keeps coming loose after your initial retorque i would say that there is something amiss.
I would try lifting the needle a notch like Paul says.