motoplat external flywheel

[jcsmith]

On my 400 I can't get the ignition flywheel off. The nut came off  fine. I don't have the removal tool so I tried with a 3 jaw puller and it's not budging. Does anyone have a suggestion ?  Chris

1974.5  Mint 400
Frame 54 410 78640
engine 4 550070

[G Ellis]

Well if you tried remove with a three prong puller, that is a big no no... You might of ruined the flywheel. You need to get an inside puller. You can get them Alan on the supplier page. I hope you did not damage the flywheel. Hope this will help.

[brian kirby]

Get the correct puller.

Brian

[George Swan]

^^^^^

What he said!!! Get the puller.

1976 Penton MC5 400 Frame # 1871

[jcsmith]

OK fellas, you've convinced me .Thanks for the advice. Chris

1974.5  Mint 400
Frame 54 410 78640
engine 4 550070

[JP Morgen]

And some heat!

[jcsmith]

JP, where is the best place to heat? The aluminum around crank end or down in the center at the threads? Thanks for the responses everyone.
                                           
                                                    Chris

1974.5  Mint 400
Frame 54 410 78640
engine 4 550070

[454MRW]

You want to expand the flywheel not the crank stub. Carefully apply heat around the flywheel just outside of the threads, but not enough to overheat the crank seal unless you are planning on replacing it now. It helps to tap the center stud of the puller once pressure is applied with the puller tool to shock the flywheel loose. Mike

Michael R. Winter
I enjoy rebuilding and appreciating Pentons!
1974 250 HS Pentons-1980 KTM 175-400'S
1975 Can Am 175 TNT & 77 250 Black Widow
1979 Husqvarna OR390
1976-78 RM & 77-79 PE Suzuki's
1974 CR250M 07 CR125R 79 CR250R

[jcsmith]

Thanks Mike.

1974.5  Mint 400
Frame 54 410 78640
engine 4 5500708

[tofriedel]

I have pulled a number of the flywheels off of many Penton's and KTM's using the correct puller. Fortunately, I have never had to use heat.  I'm sure heat will assist, but I do not like to use it around the engine

When I find a stuborn flywheel, a light tap on the bolt of the puller with a small hammer pops the flywheel off with no damage.

Tony

[jcsmith]

Thanks Tony.I'll have to get the proper puller.  Chris

1974.5  Mint 400
Frame 54 410 78640
engine 4 5500708