I took the clutch apart and the needle bearing just fell out. Bearings are ruined. I just ordered some new bearings. I will clean the inside of the drum and the clutch pads. I have looked at the Bandeloro Stuff PDF on clutch maintenance. It appears they are using a die grinder on the pads and some type of sander wheel that goes on the end of a drill. Do you have more information on what to use to cleanup the pads and the drum?
We bought these cars last year and we ran a few races at TMS in Ft.Worth. Now that I have found this website I have gained more knowledge. The clutch bearings seized up because the chain was WAY TOO tight. Now that I have the information I need to order parts for these clutches, that hurdle has been cleared. I ordered new bearings, new snap ring and a new fiber washer. Next issue is the springs.... The clutches that came with the cars have white springs. Somebody at the track said that brown springs are better, but use red if that is all you have. When I go to look up brown and red springs there are 2 different ones available. Here is what is available:
Noram Mini Cup Clutch Engagement RPMs
•Red = 1700
•White = 1850
•Blue = 2100
•Purple = 2400
•Green = 2550
•Plain = 2700
Noram Ultimate GE Racing Clutch Spring Engagement RPMs
Noram Number Color Heavy Shoe RPM Light Shoe RPM
NA013 Brown 1620 1800
NA017 Black 1820 2100
NA020 Red 1950 2450
NA030 White 2420 2740
NA040 Blue 2530 2960
NA050 Purple 2575 3010
NA060 Green 2975 3440
NA079 Orange 3100 3660
NAO86 Big Brown 3380 4020
NAO88 Big Red 3530 4320
If I were to buy Norman Mini Cup springs, there are no brown springs available and the red are on the lower RPM side. If Norman Ultimate GE springs even fit in the Norman Mini Cup clutch... it lists 2 reds and 2 browns either really low rpms or really high rpms. I have no idea which springs to get (I have no idea what rpm engagement I need). The bando with all of these issues is my 9 year old daughter's car and she is still getting comfortable racing it. My other bando is for my 16 year old daughter and she can run at the front of the pack. So do I need different springs for the two different types of drivers that I have?
Honestly the car that is smoking and shooting fire out of the exhaust has been smoking a little bit since we bought it, but now it doesn't idle at all. I have changed the oil in both cars. I did go through the carbs to change the jets to a smaller size, but the jets that were in them were actually as small as the ones I was going to replace them with. I did not clean the carbs with a mega sonic jewelry washer and I have NOT changed the spark plugs nor the valve springs.
I want to run the smaller jets in the carb that has the idle problem... I think 98 and 94? The jets that I have are all 100.
Where can I buy jets, valve springs, carb gaskets, and spark plugs? Which spark plugs are the best to use? Are we only allowed to buy carbs from 600 or are there companies that sell carbs blue printed and bench flowed? If we can use companies that blue print them... who are these companies?
We have raced QMs for 3 years and if you thought QM handlers were tight lipped think again! I can get on my phone or computer and order whatever part I need in 30 seconds for my quarter midgets. This 600 racing is crazy. Clutch burns up... What clutch is it? Where can I buy another one? Can I buy replacement parts for the clutch, if so where at? It took me 2 days to get the info on just that and I still have no real info on the clutch springs.
I have read every blog in here about clutches and it has been very helpful.
FYI I ordered my parts to rebuild my clutch from here:
http://www.bmikarts.com/Noram-Replacement-Parts-for-Mini-Cup-Clutch_p_4157.html