slow cranking 1170et

[berty]

anyone else ever suffered with slow cranking probs? (apart from after Friday night at the dog and dragon)

Have 1170 wiseco, good battery, good earth /leads  and good starter plus tried other starters just in case.

stock cams at stock settings.ignition timing bang on - both static full advance and strobe @‌ 3500 checks marry up well.

any advice /experience ??

 

 

 

Edited July 8, 2015 by berty
missed out couple words

[KATANAMANGLER]

Yes it's quite common on the ET with 1170 kits. The answer , I believe,  is to fit and EFE starter motor and intermediate starter gear . This solves the the problem. @Deeds did this just a couple of weeks ago because he had the same problem on his 1170 ET.
 

Edited July 8, 2015 by KATANAMANGLER

[berty]

had read somewhere about install momentary switch on ignition to allow cranking speed build up, or manual retarder.

will look into the efe adjustments. thanks

 

[CockneyRick]

Will this work on a GS1000?

[Screwriverracing]

Or two batteries and 24 volts to the starter.

Cheers SRR

[berty]

Or two batteries and 24 volts to the starter.

Cheers SRR

was my initial thought but a lot of extra weight , and the thought of dieting to compensate was more than I could handle !!

[coombehouse]

You could try changing the starter to the Mitsuba sm229 field coil type as fitted to older GS motors. They are a straight swap for the ND permanent magnet type & seem to crank faster particularly if you use bigger battery leads & a Motobatt battery. You can rewire them to 6 volt too they crank even faster then but I don't understand how to do that. A guy called Paul Cashio in the US does this.

 

Edited December 1, 2015 by coombehouse

[FBJ]

I did the efe starter swap on my 1170 kat. Worked a treat

[Gammaboy]

The other trick is to pull the advance mechanism apart, and grind the inner stops off the bob weights completely - retards the ignition at starter speeds over stock, max advance stays the same. Worked a treat for my high comp 1170

 

[berty]

Food for thought indeed !! 

[Gammaboy]

Here's a shot highlighting what you grind - if you just knock it back to flush with the rest of the bob weight, it works pretty well. Italso slows the rate of advange a tiny bit, which helps with the pinging at ~3000rpm that these things can suffer from.

[berty]

Are you grinding on the end face or face that sits on the cam ? 

[Gammaboy]

Face that sits on the cam - just removing the step.

Highlighted in red below:

Edited December 6, 2015 by Gammaboy

[berty]

On 8 July 2015 at 11:14 PM, KATANAMANGLER said:

Yes it's quite common on the ET with 1170 kits. The answer , I believe,  is to fit and EFE starter motor and intermediate starter gear . This solves the the problem. @Deeds did this just a couple of weeks ago because he had the same problem on his 1170 ET.
 

Just to update - the Efe intermediate starter gear I have  found to be 2.4mm thicker front to back . Which fouls the geny cover sitting Flat by about .5mm . Glad I noticed geny  cover rocking - prior to the introduction of any bolts .

Worth checking if anyone is thinking of this mod . 

Edited December 21, 2015 by berty
Spelling

[Duckndive]

 

ET uses a shim on intermediate gear ...EFE don't.....

 

[berty]

Then I stand very much corrected . I assumed the Efe had the 2 Shims / washers as with the et . 

Does it not cause wear without those shims ? 

[Duckndive]

4 hours ago, berty said:

Then I stand very much corrected . I assumed the Efe had the 2 Shims / washers as with the et . 

Does it not cause wear without those shims ? 

None in parts book and never had problem