Strongly recommend to all motorbike riders to buy new starter motor rather than just a repair the mechanical parts. Repair will be broken again and again specially for your rouser 180 starter motor. Repair and lost more time waiting for your rouser180 starter motor to penetrate the mechanics. Starter motor when broken more hassle but lest cost.
Be smart and choose brandnew starter motor for your rouser 180cc.
You can repair but doesn’t function well specially the carbon brush are not well fit on the sockets.
Motor Mechanic advice you to buy the spare parts of the starter motor to save the cost. Yet in long run you still have to buy a new one. You can save the cost for a days or month but it will be broken again because of the mechanical devices.