That's such a big help, thank you
When the old gears heated up they grew together and the clearance became negative. It's this negative clearance that locked the engine and caused the "hot start fault". While running, the engine had enough torque to force the two gears apart, by bending the drive shaft. The starter motor didn't.
The new gear has more clearance to the intermediate gear and when hot, still has positive clearance
hooroo, Errol www.engenia.com.au [139,200 km - and counting .....]
I just buy a used century racer 2012,with only 2800km on it
The old owner buy it new and don't drive much, butt have some issues
I come from Netherlands butt live in Isla Margarita Venezuela
Always warm weather here, minimal 32 Gr celcius
I buy the motor with very less km and have stay long in the garage
I have off course some starting problems and I read here some tips to solve the problem
First I have buy a new battery butt here in margarita is it very difficult to get one
I have buy now the best I can buy here, a ytx14s butt it's 11ah
I did also putt extra wire from the battery to the selenoid for more power to the starter
Also a extra negative cable
It's start now good
Because the bike is stay very long on driven the injectors are dirty and we clean it also
Also I have to buy fork seals because they are both leaking
Also a big issue is that my RPM gauge stay at 4000rpm with out running and have to repair this because I think the needle is turnover the pin
Did someone have also this RPM issue
Because I live in Margarita Island Venezuela it's very very difficult to get spare parts
I fly sometimes back to Netherland and I hope I can buy spare parts and bring it with me
I need also paddock centric bobbins for my paddock rear lift, what can I buy for it? Is see in my rear axle no tread and is 10 mm, so what solution did tnt owners use?
I can repair a Lott my self and have the tnt workshop manual and can not find the century racer workshop manual butt from the tnt2009 is almost the same I think and have also the TRK 1130 manual for reference
There is also remove in the airbox the valve because I see only a loose cable, butt it drive good
I have see also a open air filter
Sparkplug are from type NGK CR7EKB and don't know off they are good enough?
The exhaust are standard and have buy a extra standard exhaust and will modify this because I can not buy here on the island or at main land a sport exhaust and its difficult to ship to here and not possible to bring it with me in the airplane when I come back
It's realy a nice bike with some issues
So have you got any further with this Zachary?
here's to another trouble free year of Benelli riding
TNT 899 (2013)
MV F4 1000 (2010)
TNT 899s (sold)
Tornado 1130 (sold)
Aprilia Dorsoduro 750.(sold)
Here it is when have positive clearence
Original Z 25 gear have 0,04mm clearence,upgrade Z25 gear have 0,12 clearence.
There is some other diference between Z25 gears,as Engenia sad, the crown of every tooth is a bit longer on the original gear.In machines terms the module of teeth is a bit diferent per diameter,small -than negative clearence and...
This cause hot start problem and bending the Z25 shaft.
But there is one other problem with the Z25 shaft,not just bending and cracking problems.
The Z25 shaft alsow have torsion deformation,we all saw that on old shafts,it became like a drill through the entire length .This deformation is caused by a few diferent factors,but that is some other thing.
Last edited by ilijasrb; 03-16-2020 at 01:45 PM.