fishermanferg Posted November 19, 2016 Share Posted November 19, 2016 anybody know the sparkplug cap resistance should be on a 1992 xv535 2yl ive got used coils and leads and they tested fine but would like to know if the caps resistance is important the plugs are ngk bpr7es Link to comment Share on other sites More sharing options...
Moderator Cynic Posted November 19, 2016 Moderator Share Posted November 19, 2016 You have resisted plugs (that's what the 'r' means) if you use them with resisted caps your bike will run badly if at all. Resisted caps run 4Kohm resistance, so with the caps your lumping 8Kohms of resistance into your system. The ideal is unresisted caps and unresisted plugs for a really bright spark, its only to supress radio interference. One other other is fine but you don't want both. 1 Link to comment Share on other sites More sharing options...
neversaydie Posted November 20, 2016 Share Posted November 20, 2016 On 19/11/2016 at 3:39 PM, fishermanferg said: anybody know the sparkplug cap resistance should be on a 1992 xv535 2yl ive got used coils and leads and they tested fine but would like to know if the caps resistance is important the plugs are ngk bpr7es According to the book, resistance is 10,000 ohms Link to comment Share on other sites More sharing options...
Moderator Cynic Posted November 20, 2016 Moderator Share Posted November 20, 2016 Well the resisted caps on my dt were 4k according to my meter. Link to comment Share on other sites More sharing options...
fishermanferg Posted November 22, 2016 Author Share Posted November 22, 2016 (edited) hi cynic that's the reading I got on the xv535 caps would it not be different on a dt I will go back and check but the new caps I got were ngk xb05sf-r Edited November 22, 2016 by fishermanferg wrong wording Link to comment Share on other sites More sharing options...
fishermanferg Posted November 22, 2016 Author Share Posted November 22, 2016 hi cyncal have put non resisted plug caps back on bike started ok but then again it started ok with the resisted ones I'm not a dab hand with a multimeter but there was areading of about 9.200 ohms Link to comment Share on other sites More sharing options...
fishermanferg Posted November 22, 2016 Author Share Posted November 22, 2016 meant TO SAY I PUT THE ORIGINAL CAPS BACK ON I TAKE IT THEY ARE THE NONRESISTOR TYPES Link to comment Share on other sites More sharing options...
fishermanferg Posted November 22, 2016 Author Share Posted November 22, 2016 I just unscrewed the inside of the original caps and there is a small ceramic resistor inside some say to take it out and replace with a piece of metal is it ok to do that or would it be best just to leave the original caps as they are Link to comment Share on other sites More sharing options...
fishermanferg Posted November 24, 2016 Author Share Posted November 24, 2016 hi cynic I'm still a bit puzzeled my owners manual the plugs are bpr7es now if that is correct it is a resisted plug and the original caps are resistor types too ,now the Haynes manual states the plugs are bp7es which are non resistor type puzziling Link to comment Share on other sites More sharing options...
fishermanferg Posted November 24, 2016 Author Share Posted November 24, 2016 the solution may be to use non resistor type plugs bp7es which I believe were originally used in xv535s Link to comment Share on other sites More sharing options...
fishermanferg Posted November 26, 2016 Author Share Posted November 26, 2016 well the non resistor plugs have arrived bp7es now should I use the original caps or the new ngk ones both are resistor type but have different ohms Link to comment Share on other sites More sharing options...
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